It seems like I so rarely have a positive customer service experience that I am shocked and awed when things go well. I've called US Music Corp twice. The first time, my WT-400 was in the shop (Inner Sound in Portland) and the shop claimed they had faxed US Music Corp an order for a new power switch and called them repeatedly to no avail- after checking in with Inner Sound every other day for a month, I called the customer service number listed on the Eden Electronics website, where they picked up on the first ring. The rep called Inner Sound for me and arranged to have the switch shipped to them the next day. Now the power amp section of my WT-400 is broken. It gets really hot and doesn't put out any sound. I'm not going back to Inner Sound for obvious reasons- they charge a premium and provide Wal-Mart level service. I know an electronics guru, and he offered to repair it for me. So I called for schematics. I had to hold for about 60 seconds this time, but the guy on the other end knew exactly what I was talking about and I had the schematics in my inbox in 60 seconds. It's enough to make me wish I still liked Eden sound. I am a big fan of that company, but I am a big fan of Ashdown tone now. Regarding the breaking of my amplifier- there is no reason the power switch should have quit working, it was not physically broken or anything. But the power amp had every reason to quit on me. This was my first amp, and not knowing anything about amps and ohms at the time I ran it hard through an 8 ohm 1x15 and 4 ohm 2x10 for a long time. And it worked well for a very long time afterward. That's all I have to say about that.