Amp works, had it bench tested because I needed proof awhile back. I disconeected everything from my car, and then thought of selling it about 6 months ago. Took the stuff to a shop (where I had to prove the testing), but they lowballed the crap out of me, so i forgot about it for awhile. Never got around to trying to sell it again, but it tested perfect and was only used for at most 2 months before it was taken out of the car and placed in my family room. Haven't used the stuff since, but I will get pics asap...