Sony STR-V55

1 9 7 9 1979
1 9 8 1 1981

Mid-end receiver from when lineups got multiplied with frenzy.

The STR-V55 nevertheless holds what was high-tech and terribly expensive in 1977 : Pulse Power Supply, 50MHz Hi-fT transistors, X'Tal Lock Quartz-frequency PLL MPX tuning, Uni-Phase filters, low-TIM design and gold-plated phono terminals.

Also soft-touch buttons, 3-level auto-tuning selector with or without muting and eight tuning presets with pre-cut name cards plus side slider so that your memory doesn't fail.

Design-wise, this brings us back to the design iterations and prototypes made during the ES-II research in 1973/74 so there is some of the TA-F80 and some of the ST-P7J : you can't multiply without sharing some.

But if the name calls on the pretty and excellent TA-F55, there is no relation there, quality-wise, design-wise or price-wise - there's a limit to sharing if one want to keep high, mid and low-end fairly... distinct.

And as with 99,5% of the japanese-made receivers, all brands and timeframes included, this was export only.

So much so that Gradiente in Brazil even made a rebadge of the V55 named M-1660 with an obvious cosmetic parts sharing but completely different circuits and internals.

This "same-but-not-same" makes the financial advantage of the rebadge thing vanish entirely but multiplication was the 1980 trend so these share some but not all - very human in the end.

Sony STR-V55, image 1 Sony STR-V55, image 2 Sony STR-V55, image 3
Sony STR-V55 specifications
Title Value
Power output : 2x 55W (RMS, continuous, 8 Ohm, 20Hz...20Khz, rated THD)
THD : 0,02% (8 Ohm, rated outut, 20Hz...20Khz)
0,006% (preamp @ 2V)
IMD : 0,02% (rated output, 8 Ohm)
Frequency response : DC...40Khz (+0 / -1dB)
Input : 1V / 50kOhm
S/N ratio : 116dB (IHF-A)
Damping factor : 50 (1Khz, 8 Ohm)
PREAMP section PREAMP section
Frequency response : 5Hz...200Khz (-1dB)
20Hz...20Khz (RIAA, ± 0,5dB)
Phono MM input : 2,5mV / 50kOhm (MM)
Phono MC input : 0,25mV / 100kOhm (MC)
Line inputs : 150mV / 50kOhm
Maximum phono input : 200mV (MM, 1Khz)
20mV (MC, 1Khz)
IHF-A S/N ratio : 80dB (MM @ 2,5mV input)
86dB (MM @ 5,0mV input)
65dB (MC @ 0,125mV input)
77dB (MC @ 0,5mV input)
95dB (lines @ 150mV input)
Outputs : 150mV / 10kOhm min. (record out 1 & 2)
1,5V / 2kOhm min. (preamp out)
Bass control : ± 10dB at 50Hz
Treble control : ± 10dB at 20Khz
Loudness control : +10dB @ 50Hz and ++dB @ 10Khz (vol. -30dB)
Low filter : 12dB/octave below 15Hz
TUNER section TUNER section
30dB quieting sensitivity, mono : 10.3dBf (1,8µV)
50dB quieting sensitivity, mono : 16.1dBf (3,5µV)
50dB quieting sensitivity, stereo : 3.,1dBf (35µV)
S/N ratio : 75dB (mono)
70dB (stereo)
THD : 0,10% (100Hz, mono)
0,20% (100Hz, stereo)
0,10% (1Khz, mono)
0,15% (1Khz, stereo)
0,15% (6Khz, mono)
0,20% (6Khz, stereo)
Alt. channel selectivity : 80dB (400Khz)
Capture ratio : 1,0dB
Frequency response : 30Hz...15Khz (+0,5 / -1,5dB)
Stereo spearation : 40dB (100Hz)
45dB (1Khz)
35dB (10Khz)
AM suppression : 50dB
Image rejection : 85dB
Spurious response : 95dB
IF response : 100dB
Sub-carrier response : 40dB
RF intermodulation : 65dB
Muting & tuning threshold : 25 / 40 / 60dBf
AM sensitivity : 300µV (built-in antenna)
100µV (external antenna)
AM S/N ratio : 50dB @ 50mV/m
AM THD : 0,5% @ 50mV/m (400Hz)
AM selectivity : 40dB
AM image rejection : 40dB
AM IF response : 40dB
General General
PC : 125W max. (USA version)
Dimensions : 43 x 13,5 x 38cm
Weight : 6,8kg.
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