Sansui A-80 Stereo Integrated DC Servo Amplifier (1980)

Sansui A-80

Stereo Integrated DC Servo Amplifier (1980)


In the A-80, DC-Servo means sound that’s pure as pure can be these days. All stages inside the power amplifier are direct coupled. All capacitors in the signal path are eliminated. We’ve added nothing, thus lost nothing.

There are no capacitors used that can add harmful colouration to music. No wonder sound is exceptionally clean in the A-80. The DC-Servo controls ultra-low-frequency signals (all those below 1 Hz) so that they can’t reach your speakers. Which means you can, if you have to, play warped records and still hear good sound.

Power output is a comfortable 65 watts per channel both channels driven into 8 ohms, all this from an OCL (Output Capacitor-less) true complementary circuit with a DC-Servo system, built around a dependable op-amp (operational-amp) IC, for good, clean, dependable performance.


Power output: 65 watts per channel into 8Ω (stereo)

Frequency response: 5Hz to 70kHz

Total harmonic distortion: 0.05%

Input sensitivity: 0.1mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 60dB (MC), 80dB (MM), 95dB (line)

Output: 150mV (line)

Speaker load impedance: 8Ω (minimum)

Dimensions: 430 x 147 x 251mm

Weight: 7.1kg


1. General
System: Integrated Transistor Amplifier
Colour: 1=Silver, 2=Black: 2
Pre Amplifier
Inputs: Phono MM+MC; Tuner; Tape I+II; AUX; Monitor
Inp. Sensitivity High Level: 150 mV
Inp. Impedance High Level: 47 kΩ
Signal/Noise High Level: 95 (IHF) db
Inp. Sensitivity Phono MM: 2.5 mV
Inp. Impedance Phono MM: 47 kΩ
Frequency Response Phono MM: RIAA (±0.6 dB)
Signal/Noise Phono MM: 80 (IHF) db
Inp. Sensitivity Phono MC: 0.1 mV
Inp. Impedance Phono MC: 47 kΩ
Signal/Noise Phono MC: 80 (IHF) db
Output Voltage Rec Out: 150 mV
Impedance Rec Out: 47 kΩ
Tone Controls: Bass; Treble
Filters: Subsonic; High
Loudness: yes
Power Amplifier
Speaker Outputs: 2 x 2 Speakers; Phones
Continuous power 8Ω: 65 + 65 (20-20,000 Hz); 72 + 72 (RMS, 1 KhZ); 75 + 75 (DIN, 1 kHz) Watts
Frequency Response: 5-70.000 (+0.5/-2 dB) HZ
Harmonic Distortion: 0.05 % at rated output
2. Physical
Dimensions in Inches: 16.93 x 5.79 x 9.89 (w) x (h) x (d)
Dimensions in mm: 430 x 147 x 251 (w) x (h) x (d)
Weight in lbs: 15.65 lbs
Weight in Kg: 7.1 Kg


Download: Sansui A-80 Stereo Integrated DC Servo Amplifier SERVICE MANUAL