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A1201GTI
1   CHANNEL

AUTOMOTIVE AMPLIFIER


TECHNICAL MANUAL




                       JBL CONSUMER PRODUCTS
                       250 CROSSWAYS PARK DRIVE, WOODBURY, NY 11797
                       1-800-336-4JBL(4525) WWW.JBL.COM
1 Channel Automotive Amplifier
                                                                                                                                                                                                                               A1201GTI
                                                                      Controls and connections


Specifications .........................................................1
                                                          Parts Lists........................................................
Features .................................................................2
                                                          Block Diagrams.............................,......................1
Test Conditions and Notes ......................................2
                                                         Integrated Circuit Diagrams...............................11~12
Controls and Connections .....................................3
                                                          Transistor Diagrams.........................................13~14
Mounting the amplifier............................................3 Exploded View.................................15~17
                                                          Packaging
Typical System Configuration (Wiring) ....................4
                                                          Schematic Diagrams...................
                                                                                           .....................18~20
Printed Circuit Boards (Top View)................5~6                                                               Amplifier Exploded View.........................................21




                                                                                     SPECIFICATIONS




                    Number of Channels .                              .          .       .        .       .        .       .       .           .       .        .       .        .       .     .1 .     .    .
                    4 Ohms        .          .       .       .        .          .       .        .       .        .       .       .           .       .        .       .        .       .     .600W .
                                                                                                                                                                                                  .
                    2 Ohms           .       .       .        .          .       .        .       .        .       .       .           .       .        .       .        .       .       .     . . .
                                                                                                                                                                                                1200W
                    T.H.D. @ 4 Ohms rated Power                                                   .       .        .       .       .           .       .        .       .        .       .     .0.10%
                                                                                                                                                                                                  .
                    Frequency Response                                .          .       .        .       .        .       .       .           .       .        .       .        .       .     .20Hz .~ .320KHz
                                                                                                                                                                                                  .
                    Signal to noise Ratio                                    .        .       .        .       .       .        .          .        .       .       .        .       .        . 90 dB
                                                                                                                                                                                                 . .        .    .    .
                    Fuse size. . . . . . . . . . . . . . . . . . .                                                                                                                             117A
                    Input Leve Sensitivity. . . . . . . . . . . . . . .                                                                                                                        250mV - 4V
                    Minimum Speaker Impedance .                                               .            .           .           .           .           .         .           .           . 1ohm .
                                                                                                                                                                                                .                .

                    External Dimensions (Inches)
                    Length   .       .        .          .       .       .        .       .        .       .        .          .       .        .       .        .       .        .       .    14 .13/16 .
                                                                                                                                                                                               .     .               .    .    .    .
                    Width        .       .       .
                                                 .       .        .          .       .        .       .        .       .       .           .       .        .       .        .       .       . 10
                                                                                                                                                                                                .     .3/16 .
                                                                                                                                                                                                         .           .    .     .
                    Depth        .       .       .        .          .       .        .       .        .       .       .        .          .        .       .       .        .       .        . 2.    11/16 .
                                                                                                                                                                                                      . .             .    .    .    .



                    External Dimensions (mms)
                    Length . . . . . . .                                                  .        .       .        .          .       .        .       .        .       .        .       .    376 .
                                                                                                                                                                                               .         .      .    .    .    .    .
                    Width        .       .       .        .          .       .        .       .        .       .       .        .          .        .       .       .        .       .        . 274 .
                                                                                                                                                                                                 .          .    .    .    .    .    .
                    Depth        .       .       .        .          .       .        .       .        .       .       .        .          .        .       .       .        .       .        . 67.5 .
                                                                                                                                                                                                 .          .    .    .    .    .    .




  JBL continually strives to improve its products.                                                             New materials, production methods and design refinements are
  introduced into existing models without notice as a routine expression of our design philosophy.                                                                                                                                  For this reason,
  GTI Series Multichannel Automotive Amplifiers may differ in some respects from their published specifications
  and descriptions, but will always equal or exceed the original specifications unless otherwise stated.




                                                                                                                                                                                                                                          1
     A1201GTI
                                                                    1 Channel Automotive Amplifier

                                              Features



    1-Channel Operation

    Floating Ground Factory - Head - Unit Speaker - Level input

    Variable Input Sensitivity (250mV - 4V)

    Fully Complementary Output Stage with Class-AB Voltage Amplification

    Gold-plated Power, Input and Output Connectors

    2-Ohm Stable (Stereo)




                                  Test Conditions and Notes



All tests to be done, unless otherwise specified, from 10Hz to 40KHz at 14.4V DC into 4 ohm loads and adju
the units gain so that with a .250 volt input signal the unit is at its maximum rated output. All measurem
will be done using an Audio precision system one and the supply voltage.


An B+ line voltage of 14.4V DC shall be applied to the unit under test for all measurements unless otherwi
specified. The voltage applied to the unit shall be measured at the power connection on the Amplifier.


Signal   Source
Unless otherwise specified, all tests shall be conducted with the Audio Signal Generator output configured
be balanced, less than or equal to 50 ohm source impedance, and floating. The signal source "GND" shall be
connected to the Amplifier PWR GND at the Amplifier.


Output Load
Unless otherwise specified, all tests shall be conducted with 4 ohm resistive loads having less than 10%
reactive components at any frequency below 75KHz. Each resistor shall have a value that remains within 1%
while dissipating the rated output of the unit under test.


Power Indicator LED steadily illuminates for normal operation. LED blinks when
protection circuitry is engaged, and during power up.




2
 1 Channel Automotive Amplifier                                                                                                                                                      A1201GTI

                                                             Controls and Connections




                                   R                              R                                                          LPF                        BASS
                                                                                INPUT
                                                                                                                            FREQ                       BOOST
                                                                                LEVEL



                                                                                                                        .          .              .            .
                                                                            .            .
                                                                                                                      30Hz         320Hz         0dB               +6dB
                                                                           4V           55mV
                                                                                                    REMOTE


                                   L                              L
                                                                                                                                                                          A1201gti
                             FRONT INPUTS                REAR INPUTS




                                                 1                              5                                            6                         7




                                                                                FUSE 40Ax3




                                       -             +                 -   +

                                                                                                             +BATT    REM                  GND     +BATT                   GND
                                           SPEAKER OUTPUTS
                                                                                                                     POWER                                     CAPTAP




                                                          2                                  3                                     4                                  8




 Controls and Connections

1. It allows left and right input channels to be                                                 5. Input-Level Control - Adjusts input sensitivity
                                                                                                     for pre-amp level and speaker level inputs.
    connected to be amplifier using RCA plugs.
                                                                                                 6. The electronic crossover is a 24dB/oct.
                                                                                                     Low pass filter which can be Set at any frequency
2. Speaker Output Connector - Connect speaker                                                        between 30Hz and 320Hz.
    wiring to these connectors. See wiring instruc-
                                                                                                 7. The bass boost control will provide up to 6dB of boost
    tions on page 4 for more information.
                                                                                                     at 50Hz.

3. Fuse - Three 40 Amp ATC type Fuses.                                                           8. External capacitor (Optional)


4. Power Connection for 12V+, GND and REM
    connections for power wires. See wiring instruc-
    tions on page 4 for more information.



    Mounting the Amplifier

   The JBL GTI Series amplifiers can be mounted in virtually any location inside the vehicle.
   However, make sure to keep the amplifier away from heater vents or ducts.

   1. At the chosen site, use the amplifier as a mounting template and mark the locations of the
       four mounting holes.

   2. Drill a small pilot hole at each marked location.

   3. Mount the amplifier and securely tighten the mounting screws.




                                                                                                                                                                                                3
                                A1201GTI                                                                                                                                              1 Channel Automotive Amplifier

                                                                                                                                             Typical System Configuration




                                                                                                                                        Cassette/CD Tuner
                                                                                                                                            (Head Unit)
                                                                                                                                                                              CD Player or Changer




                                                                    Antenna Input
                        Power
                       Antenna
                                                                    Cassette/Receiver
                                                                      Power Supply
                                                                          Wires




                                         Power
                                        Antenna                                                                                                 Line
                                                                                                                      Fuse

                                                                                                                                      Fuse




                                         Relay                                                                                                  Level
                                                                                                                                                Input                                         Amplifier
                                                                                                                                                                                                Power
                                                                                                                                                                                             Connection
                                                                                     Black - Power Ground
Antenna Motor Ground




                                                                                                            Red - Main +12V
                                                  Remote Antenna

                                                                     Remote On/Off
                         Power Supply




                                                                                                                              Black Power




                                                                                                                                                            Remote On/Off




                                                                       Ignition
                                                                       Switch
                                                                                                                                                        60 Amp (Not Included)
                                                                                                                                                                                    Main +12V
                                                                                                                                                                    Fuse

                                                                                                                                                               Power Ground



                                                                   Vehicle Battery



                                                                                                                                                                                      Speakers




                                         Chassis Ground




          4
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  5
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               100K/0.5W




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     R693
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    104P
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1SS133
A1201GTI




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            270/0.5W                                        D691                                                           C693
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             R692
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              10/25V




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1SS133                                                               10F
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 3P




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             270/0.5W                                                                                           R695
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           D692
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     R691
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   LED01




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          LED02
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               BLUE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               R694




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           2.2/2W
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      102(M)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          D G B R




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           R671
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     2.2/2W                                                C691                                                             BLACK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1SS133                                                                    RED
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          2.2/2W

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           2.2/2W



                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            2.2/2W

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      2.2/2W




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             4P




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           D693
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           KLG-124E




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    KLR-124E
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         R672


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          R673



                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           R674


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     R675




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               D694
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1SS133
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  C692                            WA02
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      PAS086-01
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               5P                                                                                                                                            REV.0
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    WA03




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  PAS105-01                             REV.0
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     TH02




                                                                                                                                                                                                         IRF3205                                                 IRF3205                                 IRF3205                  IRF3205                                             IRF3205                                                                                                                                                                                                                                 5P                                                                                                      IRF9640                                                         IRF9640                                  IRF9640                                       IRF9640                                IRF9640                                               IRF9640                                            IRF640                                                                   IRF640                                          IRF640                                                               IRF640




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             10/0.5WF




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  10/0.5WF




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 10/0.5WF




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          10/0.5WF




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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      10/0.5WF
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  SUB01
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           220/0.25W
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          220/0.25W




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         10/0.5WF
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   50K                                2K
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                TH01




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    10/0.5W




                                                                                                                                                                                                                                                                                                                                                                                                            MUR3040PT                                                    MUR3040PT
                                                                                                                                                                                      Q746




                                                                                                                                                                                                                                                     Q745




                                                                                                                                                                                                                                                                                               Q744




                                                                                                                                                                                                                                                                                                                           Q743




                                                                                                                                                                                                                                                                                                                                                                               Q742




                                                                                                                                                                                                                  22                                                      22                               22                       22                                                   22                                                                                                                                                           R697                                  R696




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                100K




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 100K




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                REV.0
                                                                                                                                  



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