DA 3504 (serv.man14) - JBL Car Audio Service Manual (repair manual). Page 4

Controls and Connections

Controls and Connections

Mounting the Amplifier

1. Preamp-Level Input Connector - Connects to

   line-level output from the source unit

2. Speaker-Level Input Connector - Use this

    connector for speaker level input signals.

    A wire harness is supplied use with this

    connectro. See"Typical System Configuration"

    Section (page4)for wiring instructions
3. Speaker Output Connector - Connect speaker

    wiring to these connectors. See wiring instruc-

    tions on page 4 for more information.
4. Fuse - 30 Amp attached type fuses.

The JBL Decade 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.

5. Power Connection for 12v+,GND and REM
    connections for power wires. See wiring 

  Instructions on page 4 for more information.

6. Input-Level Control - Adjusts input sensitivity for pre
   amp level and speaker level inputs.

7. Crossover Selector - Determines wheth the
    crossover is a High-pass filter @120HZ(HP),a
    Low-pass filter,@80Hz(LP) or unfiltered (FLAT)

8. Bass E.Q. - This switch activates a built-in Bass
    Boost circuit used to increase low-bass output
    on the selected soeaker output group. Enables
    bass boost +6dB@50Hz
9. ST,or Stereo mode for normal operation
    MO,or Mono mode for bridge operation.

3

Multichannel Automotive Amplifier

DA 3504

2

8

1

2

4

5

3

2

1

11

6

7

6

9