ok guys i had my system for a while and working fine. but now when i turn it on i hear no sound coming from the speakers, i only hear my factory speakers. all wiring is correct, amp appears to be fine, and speakers seem to work when i connect them to my stereo inside the house without a amp. so what is the problem......heeelllpp meeeee!

I only value the opinions i give to you!

If you have the proper power and ground wires to the amp then it could only be one of 2 things. Your rca's or your speaker wire. I would first check the rca wires because a similar thing happened to me and the plugs on the rcas were really touchy. If that doesn't work, try to re-wire your speaker wires and then if that doesn't work, rewire everything. Just my 0.02

winter project: custom t3/t4 turbo and some others

Get an RCA cable that's long enough to go from your house into your car. DON'T USE THE ONE IN YOUR CAR. Plug your house system into your amp. If everything works then it's either your head unit or your RCA's in the car. Next take out your head unit and just loosely run a RCA cable over the seats to your amp. If it doesn't work then it's your head unit rca outputs. If it does work then it's your RCA in your car.

If none of that works then it's your amp. Chances of ALL your speaker wire going out at once is very slim. Can happen, but very slim.