Stereophonic Preamplifier. SN: AK2903. Aux, Tuner, Phono 1 & 2, Mic, and Tape HD Inputs. R/L Controls for both Bass and treble, headphones, and tape in/out jacks. This unit is fully serviced and tested. One capacitor added to improve power supply. Cleaned all controls, switches, jacks, tightened connectors, checked phono noise, and a 2nd switch cleaning. Includes all original packaging, owner's manuals, factory harmonic distortion test graph, cabinet available also. #9 condition