The document is a user manual for the JBL Reference 3004A and Reference 7005A amplifiers.
This owner's manual covers the installation and operation of the JBL Reference 3004A and Reference 7005A power amplifiers. It includes safety warnings, mounting instructions, and detailed wiring diagrams for power, ground, and audio signal connections (both low-level and high-level inputs). The Reference 7005A section specifically details the setup of the built-in subwoofer channel, including crossover settings, phase, and bass boost controls.
| Power output @ 4 ohms | 75 watts RMS x 4 (3004A); 50 watts RMS x 4, 320 watts x 1 (7005A) |
|---|---|
| Power output @ 2 ohms | 100 watts RMS x 4 (3004A); 75 watts RMS x 4, 500 watts x 1 (7005A) |
| Frequency response | 10-40 K Hz (3004A); 10-40 K Hz / 10-320 Hz (7005A) |
| Crossover frequencies | 32-320 Hz variable, 12 dB/ octave |
| Fuse rating | 30 x 2 (3004A); 30 x 3 (7005A) |
| Operating voltage | 9~16 V |
The recommended wire gauge is 8.
This indicates DC voltage on the amplifier output, and the amplifier may need service.
This is often caused by the amplifier picking up alternator noise, frequently due to a loose or improper ground connection.