Automotive
Junior Member
a dual XPR520 amplifier with two 300rms 4 ohm pioneer subwoofers. I checked all fuses which have .2 ohms resistance and ground path is straight to frame through floor. REM is to a 20 amp fuse going to my ignition triggered outlet in the vehicles fuse box. I have double checked all wires for shorts and polarity of speaker wires. However the amplifier is stuck in protect mode.