This is a two cabinet combination tube amp and tube organ. Built by the Lowery Organ factory in Chicago in the 1960's for Cordovox it has the organ "tone generator" in one cabinet and the power supply and speaker and amp in the other. There is only a volume control and an unbalanced 1/4" mic input to plug into but it sounds great! Its a 35 watt push pull 7591 pair and a 12AU7 input circuit.