They claim to have a "Tech" who will test it once they get it back. I'm really curious to hear what they say. Your probably right about the hit or miss type of products, they claim however to only send "tested" products? I really doubt thast is even possible with all the junk they are selling. I have to say that I checked their feedback on these amps and didn't find even 1 bad comment that was directed toward this amp not working as expected, very surprised, I really was expecting to see a long list of complaints. But, there was only about 6 total feedbacks on them and the ad says over 80 were sold at that time, meaning there could be a pile of people going through the same thing I am. Of course I'm not going to leave any comments till it's all said and done, that means that most comments will be added about a month from when they bought it it they are doing a return or replacement. Since there is such a lack of replies, it's a good chance that I'm not the only one who is unhappy but has to wait it out before I reply. One more thing they did offer me a $10 refund if I wanted to just keep it, that would have set the price at $73 total for an amp that I could barely hear. At least they tried to settle it in some way, most wouldn't even bother replying, and they do reply very quickly, so, I don't feel like they are intentionally trying to screw me, even if they are. Besides that eBay will protect buyers from getting burned, that's the great thing about buying from eBay. You won't find that on other web auction sites.