AMT Electronics Stonehead 50-4 - 50-watt 4-channel solid-state guitar amplifier. All 4 channels of the amplifier's preamp section are built on the proprietary JFET technology which effectively emulates vacuum tubes-based devices. The increased power voltage allowed to reveal the channels' dynamic characteristics to their
AMT Electronics in its current state was founded in 2001 by father and son Sergey and Yan Marichev and they was well met by worldwide music community at MusikMesse 2001. Together with Alexander Chernyaev and Victor Kampf they formed brilliant team who created many innovative and original guitar products including latest brand new Warmstone 'tubes'- solidstate fully functional equivalent of vacuum tubes 12AX7 and 6L6 and this is only beginning!