I picked up one of these amp heads on a whim with low expectations and was completely blown away! I was looking for a back up amp for playing out and didn't want to haul around another big amp. The thing looks like a toy and is incredibly small but plugged into the speaker of my 50 watt Mesa, it totally delivers! It has a 12AX7 pre amp tube and a 20 watt solid state power amp. We usually mic our amps at shows and this thing brings the power! A heck of a deal, and if you have a relationship with your Sweetwater rep, can get it cheaper than shown.
http://www.sweetwater.com/store/det...e=&network=g&gclid=CKn026aM2ckCFZY0aQodEPkM7g
http://www.sweetwater.com/store/det...e=&network=g&gclid=CKn026aM2ckCFZY0aQodEPkM7g