Fearsome Sound specializes in the repair and modification of vintage, vacuum tube guitar amplifiers. Check out the Repair Work page for some examples of vintage gear that has passed through the shop. Fearsome Sound is also home to "Tuber" - a vacuum tube based distortion preamp in stomp box format.   One and two channel versions are presently available. More information about Tuber is available on the Product page and you can check out audio samples on the Media page.