1980s Sansui A-550 Integrated Stereo Amplifier in good condition

Fully tested and working with great sound. Loudness button is a big plus
Note: slight treble crackling present on the left channel when used with speakers requiring 60 watts or more

Power output: 30 watts per channel into 8? (stereo)
Frequency response: 10Hz to 50kHz
Total harmonic distortion: 0.07%
Input sensitivity: 2.5mV (MM), 150mV (line)
Signal to noise ratio: 72dB (MM), 90dB (line)
Output: 130mV (line)
Speaker load impedance: 8? (minimum)
Dimensions: 430 x 112 x 230mm
Weight: 4.1kg