Up for sale is a fantastic Thunderfunk 550B head. Upgraded with the tube switch, I can't say enough wonderful things about this amp. In the year that I've used it it has never let me down. Sounds fantastic and shows light signs of wear on the top and face but is in great condition. Worst being a scrape around the word power on the front. Just went through a friends shop with a perfect bill of health and I had a new, more quit fan installed. I'm downsizing otherwise I would never part with it and she is priced to sell! $550 plus actual UPS shipping CONUS. No trades please (downsizing) Also included is the Thunderfunk rack mount kit (a $50 option).