INSTRUCTION MANUAL
PA602 | PA604 | PA500D
Amplifier Settings
Master/Slave Bridging
The PA500D is capable of running in a Master/Slave configuration. This implies that two amplifiers can be ran
in sync to the same subwoofer voice coil, or subwoofer configuration. The result of which is twice the output
than what one amplifier could offer on the same load. Please note that each amplifier in this setup will see half
the load, meaning a 4 ohm woofer will net 2 ohms per amplifier. This is the minimum impedance which the
amplifier can support in this setup.
For configuring gain and crossover, you only need to adjust this on the master amplifier. The master amplifier
will be identified by which receives the input signal from your source head unit. There is no “master/slave”
switch as typically found on other amplifiers. To configure the amplifiers, you will run from “Bridge Out” on the
master to “Bridge In” on the slave. Please refer to the wiring illustrations in this manual for a configuration
diagram.
Protection Circuitry
This amplifier has been outfitted with protection circuitry against short, overload, low voltage and thermal
shut-down. In a functional state, the NORMAL LED glows solid and indicates “power on”. Should the amplifier
sense any fault in your speakers or subwoofers, it will flash to indicate a malfunction.
The PROTECT light will glow if the amplifier detects excessive heat, reverse polarity, short circuit or overload.
In this case, shut the power to the system and allow time for cooling to bring the amplifier back to a functional
state.
If the PROTECT light remains lit after cycling the power OFF then ON, internal damage to the amplifier may
have occurred. Please return the amplifier to the original place of purchase for inspection.
Fusing
Fusing your car audio system ensures effective protection against current overload. The PA500D has been engi-
neered without a fuse, as establishing the proper fuse value is dependent on amplifier load. When running the
amplifier at 4 or 2 ohms, the recommended fuse is 40 amps. If running in a 4 ohm master/slave configuration,
an 80 amp fuse is required.
