Pioneer integrated amplifier SA-6750 with tone control via analog knobs and speaker output function. - Model: SA-6750 - Brand: Pioneer - Features: Tone control (bass, treble) - Speaker output: A+B - Volume adjustment: Analog knob - Headphone jack: Yes - Balance adjustment: Left/Right Thank you for viewing. This is a Pioneer integrated amplifier from about 50 years ago. Sound output has been confirmed via AUX and Tuner, and it plays without any problems. Phono has not been confirmed due to lack of a player. There is a slight issue: the lamp may be unstable for a while after the power is turned on. Please wait for the lamp to stabilize before playing. Due to the above reasons, it is considered as junk. Please note that we cannot guarantee the operation of this old model. Please consider this information before purchasing.