YAMAHA NATURAL SOUND 2/4 CHANNEL POWER AMPLIFIER MX-55 was just bench tested. It works and sounds great . There are marks and scratches on the cabinet as it is used. This comes from a smokers home. This unit is decades old and there is no warranty. If you want to restore it , it is a beautiful amplifier. No Warranty. No Refunds, Exchanges, Or Credit. ( SEE PICTURES ) 


Power output: 70 watts per channel into 8Ω (stereo), 35 watts per channel into 8Ω (4 channels)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.003%

Damping factor: 170

Input sensitivity: 1V

Signal to noise ratio: 122dB

Speaker load impedance: 6Ω (minimum)

Dimensions: 435 x 129 x 379mm

Weight: 9.5kg

Year: 1990