Tweet
took the boat out yesterday and the cabin speakers wouldnt work. Checked the amp and it had the overheat protection light on turned red. This is with no use. Boat is a 15 230 with the Polk system. Any experince with this?
-
-
I think on those amps, that is a general protect indicator, so not specific to over heating. Can be a number of things from voltage to a shorted speaker -
checked fuses and wiring, everything seems fine. speakers all were working fine also when protection circuit lit up. anybody have any ideas?Comment
-
It's now time to pull out the multimeter and start measuring. Check the voltage across the amplifier primary terminals (not at the battery). You should have at least 12.0 volts. Check the resistance of each disconnected speaker wire leading away from the amplifier. Disconnect both inputs and outputs, leaving only the three power terminals connected. Power down for awhile and then power back up. Then see if the amplifier remains in the 'protect' mode with no inputs or outputs. If nothing of concern is revealed then it would be time for A) a bench check, and B) a peek inside looking for evidence of water damage.Comment
-
so how do I check speaker wire resistance, and what reading am I looking for? I can do AC, but have little experience with dc or audio systemsComment
-
All speakers 3.8 ohm. Continuity good on all wires as well. Line voltage 12.4, same as battery. All speakers and rca cables disconnected and protection circuit still on. I assume the amp is bad?Comment
Comment