I just picked up a pair. Normally run a Mc240 but these are quite a bit more power. They sound very fine. they're supposed to be the same as the newer AQ1008's.Some really nice features like regulated bias supply is a nice touch. Also the delayed turn on of the output tubes until warmed up. Also can set the bias of each tube by selecting it on the side and adjusting a trim pot while reading the meter on top. I'll run them this winter. They'll help keep the room warm.