Subs to home stereo, just to make sure. Amp, just jump the remote to the power, ground it and test it on a battery. That will only test for power though, no sound...
put a multi-meter on the coils of the subs to see if the coils are still good. the only way i can tell you to check a amp is to eather hook it up in the car, or take it to a shop and have it bench test it.