High quality, manufactured by Marantz, this is a magnificent amplifier, one of the best amplifiers of the 70s in terms of sound quality and price. In a magnificent state of preservation, it is like new, very well preserved and cared for. The front of the amplifier is exquisite. All aluminum finished with the wooden box. In perfect condition, very well preserved. Complete review, cleaning of potentiometers, interior and exterior cleaning. The sound is magnificent, rich with great detail. Specification Power output: 15 watts per channel into 8Ω (stereo) Frequency response: 20Hz to 50k. Hz Total harmonic distortion: 0. 1% Input sensitivity: 2m. V (mic) , 2m. V (MM) , 100m. V (line) Signal to noise ratio: 66d. B (MM) , 80d. B (line) Speaker load impedance: 4Ω (minimum) Semiconductors: 27 x transistors, 10 x diodes Dimensions: 14-19/32 x 4-13/16 x 11-5/16 inches Weight: 15. 5lbs Finish: silver