Superscope - QA-420 Quadrophonic Solid state integrated amplifier

Superscope - QA-420 Quadrophonic Solid state integrated amplifier #1.0
Superscope - QA-420 Quadrophonic Solid state integrated amplifier #1.0
Superscope - QA-420 Quadrophonic Solid state integrated amplifier #2.1
Superscope - QA-420 Quadrophonic Solid state integrated amplifier #3.2
Superscope - QA-420 Quadrophonic Solid state integrated amplifier #4.3
06
days
19
hours
22
minutes
49
seconds
Starting bid
€ 1
No reserve price
Matthew McIvor
Expert
Selected by Matthew McIvor
Estimate  € 280 - € 350
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Superscope QA-420 Quadrophonic amplifier, manufactured in 1972, is in very good physical condition and has been tested and is working, and includes a power cord.

AI-assisted summary

Description from the seller

Vintage rare quadrophonic amplifier from Superscope (Later Marantz)

Power output: 15W/ch into 8Ω (stereo), 50W/ch into 4Ω (quadraphonic)

Frequency response: 30Hz to 20kHz

Total harmonic distortion: 0.3%

Input sensitivity: 2.5mV (MM), 200mV (ceramic), 130mV (line)

Signal to noise ratio: 60dB (MM), 70dB (line)

Speaker load impedance: 8Ω (minimum)

Dimensions: 4-33/64 x 16-23/32 x 10-33/64 inches

Weight: 16.5lbs

Year: 1972


Fully tested okay,

Little signs of use on the back of the woodcase vinyl and a repair on the rca input.
Pictures are description.
Carefully shipped

Vintage rare quadrophonic amplifier from Superscope (Later Marantz)

Power output: 15W/ch into 8Ω (stereo), 50W/ch into 4Ω (quadraphonic)

Frequency response: 30Hz to 20kHz

Total harmonic distortion: 0.3%

Input sensitivity: 2.5mV (MM), 200mV (ceramic), 130mV (line)

Signal to noise ratio: 60dB (MM), 70dB (line)

Speaker load impedance: 8Ω (minimum)

Dimensions: 4-33/64 x 16-23/32 x 10-33/64 inches

Weight: 16.5lbs

Year: 1972


Fully tested okay,

Little signs of use on the back of the woodcase vinyl and a repair on the rca input.
Pictures are description.
Carefully shipped

Details

Era
1900-2000
Brand
Superscope
Model
QA-420 Quadrophonic
Physical condition
Very good
Number of objects
1
Includes
Power cord
Weight
9 kg
Functional condition
Tested and working/playable
The NetherlandsVerified
6028
Objects sold
100%
2260
Reviews
protop

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