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Sony STR-7055

FM Stereo / FM-AM Receiver (1973-74)

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Sony STR-7055

Specifications

Tuning range: FM, MW

Power output: 35 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 70kHz

Total harmonic distortion: 0.2%

Damping factor: 50

Input sensitivity: 3mV (MM), 250mV (DIN), 250mV (line)

Signal to noise ratio: 70dB (MM), 90dB (DIN), 90dB (line)

Output: 250mV (line), 30mV (DIN), 1V (Pre out)

Speaker load impedance: 4Ω to 16Ω

Dimensions: 471 x 157 x 375mm

Weight: 15.3kg

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Reviewed Dec 22nd, 2017 by zelim70ies

The STR-7055 was a great success for Sony, and therefore it might still be easy to find one of these great receivers. They sound fantastic even after more than 40 years, and in my opinion, the design is like vintage receiver should look like. All necessary inputs and outputs are available, and it is build solid. Nevertheless the STR-7055 has a weakness: The bulbs for scale illumination are shielded by a piece of cardboard with aluminum foil on it. After a few years the cheap solution is burned, resulting in aluminum flitters inside sometimes causing shorts- that wasn't good engineering. Originally the tuning an volume knob are not illuminated, when this is visible the shielding is already gone. This can be fixed, no great job, there are solutions to keep this nice looking light for the knobs. The power supply board should be checked as well, one of the resistors is heating up. As this resistor has some distance from the PCB it won't hurt other parts, but the cabling along shouldn't come to close, the isolation will get weak. If you fixed these safety issues, you can enjoy one of the best sounding vintage units - this one doesn't have to hide behind Sansui or Pioneer

 

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