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I am assuming this is a new unit. Take a 9V battery and momentarily connect it across the speaker wire, it must not be connected to the amp. If it makes a noise that indicates that the speaker is probably OK, if not you found your problem. You may want to take to the store where you bought it for help. Check: http://assets.peavey.com/%5Cliterature%5Cmanuals/116558_26336.pdf You can download the manual.
Is the amp in protect mode? Maybe a red light on the amp. I would also open the amp and check the RCA connections aren't loose. It's usually a solder joint. Swap the amp out as well. Or check your power wire. Sometimes amps come on when it gets remote power, but actually the power wire has a bad fuse or connection.
there is probably a switch that says lpf-full-hpf those are your low pass filter(only low tones) full which is all ranges of sound and high pass filter which when you want to hook up a set of mids or highs I hope that this helps u out
I know you say all your cabling is correct and I don't doubt you at all. However, the problem you describe sounds an awful lot like a short or an impedance problem with your speaker wiring. Make sure that the ohm ratings for your speakers are correct for your amp, make sure that the + and - wires for each speaker don't touch each other (especially easy to do where they connect to the amp), make sure that no speaker wires are cut or crimped (easy to do if you are burying under a baseboard or something), and finally make sure that all the speakers are wired correctly and are in phase.
A good test procedure is to remove all speaker connections from the amp. Then run new (test) wires from the amp to just your front speakers or to two known-good speakers with correct ohm impedance. If the receiver works that way, it tells you that you have a problem somewhere in your wiring.
Good luck and please let me know if this helps.
Is the amp being fed directly from the head unit's RCA preamp outputs or is it being fed by another amp's preamp outputs? Try temporarily wiring up a speaker you know is good in place of the sub and see if anything changes.
You changed the fuses on the amp, but have you checked the fuse that is inline on the +12V wire? Most of the time, it's right near the battery terminal.
Do you have +12V at the amp's power terminals? If not, either your +12V or ground line has a break or disconnect.
Try taking a piece of wire and connecting it to both the remote connection of the amp and the +12V on the amp. This should cause the amp to turn on (if all is well). If not, the issue might be internal to the amp and would require professional repair.
ok on the factory radio there is an adapter kit you can get that plugs into the back of the headunit and will push the sound to the subs i had one in my car till i got a new headunit and it worked fine. id recommend that you go to your local sound shop like a detail shop or some place that installs them for a fee and ask them what you think