Is there a way to test an amp (just to see if it works) quickly, outside of a car?...I don't want to get screwed if I buy an amp that doesnt work on ebay now and not put it in till May where I find out it doesn't work and I can't return it.
well if you dont want to run your power and ground cables within the car you could always hook it up to a spare 12v source (another unused car battery) make sure you ground correctly and then use your remote lead and preamps to get out a signal. that is assuming you have subs to test out on, if not youll also need a voltmeter to see if theres current at the terminals. not much of a help though since the deck still must be taken out and hooked in.
maybe this helps and remember to get a good ground!