Pioneer - A-331 Solid state amplifier

Pioneer amplifier A-331 in very good condition, tested and fully functional.
Very few signs of wear.
It lay, packed away in the closet, for 25 years.
Arrives well packaged and insured.
Please carefully examine the pictures so that there are no misunderstandings later.

Manufacturer: Pioneer
Model: A-331
Year of manufacture: 1987
Made in: Japan
Type: integrated amplifier
Remote control: No
Power consumption: 410 W (max)
Dimensions: 420 x 352 x 126 mm
Weight: 6.9 kg
Color: black

Connections

Number of inputs:
1x Phono (Cinch): 2.5 mV / 50 kΩ (MM)
CD, Tuner, Line, 1x Tape In (Cinch): 150 mV / 40 kOhm
Number of outputs:
1x Tape Out (Cinch): 150 mV / 2.2 kΩ
Headphones (6.3 mm jack)
2 speaker pairs (binding posts)

Technical Data

Continuous power output (at total harmonic distortion)
8 Ohm: 2x 40 W
4 ohm: 2x 50 W
Dynamic performance
8 Ohm: 55 W
4 ohm: 90 W
Total harmonic distortion
0.02% (20 Hz - 20 kHz, 40 W, 8 Ohm)
0.03% (20 Hz - 20 kHz, 50 W, 4 Ω)
Frequency response
PHONO (MM) 20 Hz to 20 kHz ± 0.3 dB
CD, TUNER, LINE, TAPE 5 Hz to 100 kHz +0 dB / -3 dB
Stereo channel separation
Signal-to-noise ratio
Phono (MM, 5 mV input): 89 dB
CD, Tuner, Line, Tape: 108 db
Damping factor
Tone control: analog (-30 dB)
Bass: ±8 dB (100 Hz)
Treble: ±8 dB (10 kHz)
Loudness: yes, Taste ( + 5 dB - 100 Hz / +3 dB - 10 kHz)

Special equipment

recording selector switch
Speaker pairs and headphones are switched via relays
metal front plate
Phono - MM input
Adapter jacks — for inserting an equalizer (default bridged)