I have got some problems with my 5 month old WA22. Yesterday I was going to listen to my new Denon D7000. When I turned on the amp, the main fuse went off in my home, it got totally dark. So I switched fuse and turned on the amp. It worked. I swapped some tubes to see if it was the problem. But it worked. So I listened for a while and turned it off. Later on the evening I remembered that WA22 has a hi and loww switch and wanted to try the D7000 on the low setting. When i turned it on the fuse went again. Today I can't power it without the fuse going off. I have tried different electrical contacts, but it seems to be a different problem. I have just contacted Woo Audio, but I want to hear if you know an easy fix. I was so looking forward to take a whisky and listen to some music. Thankful for every kind of help!