I was going to buy a VTL amp. Matter of fact it's the only negative review i have here after the auction. I was told by the seller about a hum. I called VTL 3 times and only talked to some lady. She told me that it was a transformer hum and it would cost more to fix it then it was worth and that some of their older models did that. She told me some people just put them in a closet so they didn't hear it. My wife called, because it was difficult for me to understand her English, and she told her to fix that type of problem was similar to removing the engine from an automobile. I had a hard time believing that and wanted to talk to someone else about it, but after four phone calls and never being able to talk to anyone but her, I decided it was in my best interest to back out of the auction, which I know is wrong, but at the same time, the hum was never mentioned in the ad. I've dealt with many companies such as Audio Research, Rogue, B & K, ect. and all these companies had excellent customer service, especially Leonard at Audio Research. You want a part and the scematics of a product, boom he sends it to you. Not saying VTL is a bad company, I know they make some very good products, but I had an overall bad experience with the customer service end of it. I believe if I was able to talk to someone with working knowledge of the amp my questions may have been answered, and possibly I would have bought the amp. Who knows. I personally don't think VTL has very good personal service, but this is only my experience. Hope this helps.