Hey my subs stopped working on me the other day so today I was checking found an un-related problem with the amp so I changed it out but am still having problems, I have even tried changing RCA cables from the deck to the amp, and checking the wires from the amp to the cone of the Sub but all was ok. They would stop before but come back on, either on there own or if I hit a good bump
Sounds like a Ground problem on the amplifier earth connection to chassis, could be a little loose if so.. also check if the paint is scraped off, so there is good ground. Also check all positive 12+ on the amplifier if all wires is tight. Cheers mate
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check your subs by connecting them straight from the stereo. If they work then there is an issue with the signal comming from the stereo through the rca cables to your amp, check those. Try another amp if you can with those rca's or test the amp with a friends car, either way try to rule out everything until it points to the problem.
when you car is running, it charges the battery somewhat. So the voltage problem is not a problem. The red light means the amp is going into ''Protect Mode". This usually happens when something is wrong with the amp. Usually the amp is getting hot. Check all of you connectiong and check the final impedance of the subs. Make sure the amp can handle the impedance of the subs. If you need anymore help, message me.
if u have the amp bridged un bridge it. chack an see wat the ohms are on the subs an make sure the amp is stable to carry the ohm load..if u have 4ohm subs one sub per channel then u shud be fine that wud make the amp see 4ohms but if u have dual voice coil subs it cud be the configuration of the subs..here's a link on how to wire subs hope this help..http://mobile.jlaudio.com/support_pages.php?page_id=145
You did not say whether or not you checked the wiring going to your subs. Many times, a shorted or grounded speaker wire will cause an amp to fail. And if the amp powers up OK with the subs disconnected, I'd suspect one or more of the wires.