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A601GTI

1  CHANNEL
 
AUTOMOTIVE AMPLIFIER

TECHNICAL MANUAL

JBL CONSUMER PRODUCTS
250 CROSSWAYS PARK DRIVE, WOODBURY, NY 11797
1-800-336-4JBL(4525) WWW.JBL.COM

SPECIFICATIONS

1

1 Channel Automotive Amplifier

A601GTI

Controls and connections

Number of Channels .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

4 Ohms    .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

2 Ohms    .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

T.H.D. @ 4 Ohms rated Power    .  .  .  .  .  .  .  .  .  .  .  .  . 

Frequency Response    .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

Signal to noise Ratio   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

Fuse size. . . . . . . . . . . . . . . . . . .   

Input Leve Sensitivity. . . . . . . . . . . . . . .

Length  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

Width    .  .  . 

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

Depth    .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

Length  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

Width    .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

Depth    .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

1

300W

600W

0.10%

20Hz  ~  320KHz

90 dB

200A

250mV - 4V

1ohm

12 9/16

9  1/16

2  1/16

319

229

67.5

External Dimensions (Inches)

External Dimensions (mms)

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.

Minimum Speaker Impedance .   .   .   .   .   .   .   .   .   .   .   .   .

Specifications .........................................................1
Features .................................................................2
Test Conditions and Notes ......................................2
Controls and Connections .....................................3
Mounting the amplifier............................................3
Typical System Configuration (Wiring) ....................4
Printed Circuit Boards (Top View)..............5~6

Parts Lists.........................................................7~9
Block Diagrams.............................,......................10

Packaging Exploded View................................14~16

Integrated Circuit Diagrams...............................11~12

Transistor Diagrams..............................................13

Schematic Diagrams...................

....................17~19

Amplifier Exploded View........................................20

2

Features

1 Channel Automotive Amplifier

A601GTI

Test Conditions and Notes

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)

All tests to be done, unless otherwise specified, from 10Hz to 40KHz at 14.4V DC into 4 ohm loads and adjust 
the units gain so that with a .250 volt input signal the unit is at its maximum rated output. All measurements 
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 otherwise 
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 to 
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.

Controls and Connections

1 Channel Automotive Amplifier

3

A601GTI

Controls and Connections

Mounting the Amplifier

1. It allows left and right input channels to be 

    connected to be amplifier using RCA plugs.

 

    

2. Speaker Output Connector - Connect speaker

    wiring to these connectors. See wiring instruc-

    tions on page 4 for more information.

3. Fuse - Two 30 Amp ATC type Fuses.

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.

4. Power Connection for 12V+, GND and REM 

    connections for power wires. See wiring instruc-

    tions on page 4 for more information.

5. Input-Level Control - Adjusts input sensitivity

    for pre-amp level and speaker level inputs.

6. The electronic crossover is a 24dB/oct.

    Low pass filter which can be Set at any frequency 

    between 30Hz and 320Hz.

8. External capacitor (Optional)

R

R

L

L

FRONT INPUTS

REAR INPUTS

INPUT
LEVEL

4V   55mV

30Hz   320Hz

0dB       +6dB

 LPF
FREQ

 BASS
BOOST

.

.

.

.

.

.

A601GTI

1

5

6

7

REMOTE

SPEAKER OUTPUTS

FUSE 30Ax2

+BATT

+BATT

REM

POWER

CAPTAP

GND

GND

-             +             -              +

2

3

8

4

7. The bass boost control will provide up to 6dB of boost
    at 50Hz.