This is pretty amazing little amp. It's 50 watts per side and about the size of a couple packs of cigarettes (assuming anyone remembers what those looked like). I've included a photo of the amp with my iPhone next to it just to give a true idea of the size. It uses an external lap top style power supply.
The sound is clean, crisp, and very neutral. I actually have two of them and I've been using them to power my guitar modeling rig but I've also used one of them to run a stereo with a large pair of Polk Audio towers and it sounded great.
Here's a link to the listing for this little guy at Parts Express. it has all of the tech details.
http://www.parts-express.com/pe/showdetl.cfm?partnumber=300-383
E-mail or phone/text me at