This is a Stromberg Carlson 2 channel 6L6 amplifier that was marketed in 1951. It is a Model AU-35. I tested it with the phono input and it worked great on both channels. No noticeable hum. It has one phono volume control, 3 microphone volume controls, 2 master volume controls, bass and treble controls. I didn't test the microphone inputs (no microphone). It is in very good cosmetic shape. It can be easily modified to be a stereo ampifier, harp or guitar amplifier. Ships to United States address only.