2 things wrong with my stereo

1. majority of the time, when i turn my system on i can hear my sub bursting out unneccessary power and it continuously pumps out power to the point where it sounds like a foghorn. my friend said the ground was fine but I'm not experienced enough to know what to do. Is it a short with wiring from the sub to the amp or from the amp to the deck? 2. While my music is playing, after so long I can hear my speakers cut out on me and it's always in the same way. The first speaker to cut out is passenger front, then pass. rear, then the entire driver said at once. If I leave my faceplate off for like 5 minutes then I'll get sound again. Does this sound like a short, or did some dude just wire the system in the jankiest way ever? Any and all advice / opinions would be helpful as I wanna get this fixed asap.

H.U - Alpine CDA7977 Amp wired to speakers - Pheonix Gold zx475 Amp wired to sub - Pheonix Gold zx400 Sub - 12' Diamond Audio (do not know the model of it, illegible on receipt) speakers - unknown. (illegible on reciept, possible model# A466XS) hopefully this can help out

Well, without knowing the make/model of the sub it is impossible to tell you if the impedance is too low for the amp, and same for your mains speakers.  The amp you are using for the sub needs no less than a 4-ohm load if you have it bridged.  When you say "receipt," if you know where you bought these, go back and ask them.  At the very least you need to make sure your amplifier gains are set properly so they are not being over-driven.  Please read and follow the "how to set your gains" sticky thread.Support the12volt.com

linkinpark1443 wrote: H.U - Sub - 12' Diamond Audio (do not know the model of it, illegible on receipt) speakers - unknown. (illegible on reciept, possible model# A466XS) hopefully this can help out

Bet ya 10 to 1 the speakers are marked somehow, someway with impedance.

It's as simple as a part #