This is exactly the reason I sold my WW and went with Mesa and Genzler. I was a WW user from about 1995 to 2010 and yes, they are excellent amps. The downside is Walter is a one-man operation and he's now prolly in his late 70s. What happens when he is no longer able to work on the amps? I'm pretty sure the company goes away with him - no kids to take over - no selling it, etc. WW has always been hard to reach BTW. If he was on vacation for two weeks at a time or longer, you wouldn't hear from him until he got home. From what I understand, there are no part numbers on the components used and no schematics are available - by Walter's design. I can understand that way of thinking BEFORE all the other companies making class D amps, but now they're everywhere. It took a long time for all the other MFR's to catch up to WW!! I remember emailing GK years ago and inquiring about making a WW type amp. At that time, GK had a little micro amp, but it was only 150W. I'm sure I was not the only one requesting a small high powered amp. I think (not sure) GK was among the first companies to come up with a high powered micro head. Just my $0.02.