Ampslab - Designs and sells power amplifier kits up to 600 watts for hi-fi, home theater and pro-audio. Digital Amplifier Company - Makes and sells digital amplifiers for home studio, audio reference systems, and music reproduction. Fliptops - Source for parts for the restoration and repair of vintage and modern Ampeg amplifiers. KR Audio Products - Provider of KR Audio products. Sells a line of tubes and solid state amplifiers and pre-amplifiers. mp3 Amplifier - Sells portable audio amplifier, mp3 usb travel kit and player, and electronic gadgets. voice-amplifier - Offers a selection of portable voice amplifiers. Goodcomponent - Sells tube socket, amplifier chassis, and transformer covers. Classic Audio Parts - Factory authorized reseller for ATI, Audioaccess, BGW, and Theta Digital, specializing in close-outs and B-stock products. Class-D - Supply a range of amplifiers, PA systems and high power audio speakers and components. Jim McShane Vacuum Tubes - Seller of vacuum tubes for audio primarily.