This is a restored Dynaco ST 70 upgraded to even better than original specs. The restoration was done by the well known amp expert restorer who sold many amps on audiogon This amp was upgraded by Cleby. All point to point hand solder all caps and resisters and boards upgraded. Everything was gone over by this expert keeping its original cloth lead transformer to keep its value and great original ST 70 Dynaco sound. This amp works perfect and looks great! Very powerful rich highs and full bass. Priced for a fast sell.