SET 300B parallel, putting out 18 watts per channel. 3 RCA inputs. Direct switch so can be used as amp only. All hardwired. Massive power supply. True dual mono in single chassis. Voltage switch - 115V/230V on back of amp. Tube bias by knobs on each 300B with digital meter readout on top of amp. Upgraded MIT coupling caps. Just serviced. Perfect performance and excellent condition. All tubes brand new including matched quad Black Bottle 300B ( value $800). Tube compliment: 4- 6SN7 input ( 2 per channel) 4- 300B ( 2 per channel) 2- 5AR4 rectifiers( 1 per channel). Amazing sound. A steal at this price.