Sansui AU-555

Power output: 20 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 50kHz

Total harmonic distortion: 0.5%

Damping factor: 12

Input sensitivity: 3.5mV (mic), 2mV (MM), 200mV (line)

Signal to noise ratio: 80dB (MM), 80dB (line)

Output: 140mV (line)

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 22 x transistors, 6 x diodes, 4 x thermistors, 1 x SCR

Dimensions: 15 x 4-3/8 x 10-7/8 inches

Weight: 17.4lbs