Sony TA-1055

1 9 7 3 march 1973
1 9 7 5

The small one, made for those who wish to not fiddle before listening to their favourite piece of music.

As per Sony's then current numbering scheme, the TA-1055, lower-numbered, is the bigger one, the TA-1066 is the small(er) one.
The main differences are a supplementary input, an IC preamp stage and an effective external heatsink on the back.
Both are DC design, both had a stock wood-enclosure and both are very good-looking, the TA-1055 especially - perhaps more than the big separates Sony had then available... can't have it all !

Made to be amplify the ST-5055 and ST-5066 tuners - equally unpretentious, equally good-looking :)

A miniseries of two which, in Japan, was augmented by two : TA-1070 (june '74) and TA-1090 (july '74).
A miniseries of two which, in Japan, was augmented by two : ST-5070 and ST-5090.

Not many Watts per channel but these were 1970s Watts and they still are !

Sony TA-1055, image 1 Sony TA-1055, image 2
Sony TA-1055 specifications
Title Value
RMS Continuous power : 2x 20W (40Hz...20Khz, 8 Ohm)
2x 27W (40Hz...20Khz, 4 Ohm)
Dynamic power : 70W (8 Ohm)
THD : 0,1% or less @ 1Khz @ 1W
0,5% or less at rated output (40Hz...20Khz)
IMD : 0,2% or less @ 1W
0,5% or less at rated output (40Hz...20Khz)
Bandwidth : 10Hz...40Khz (8 Ohm, 0,5% / 0,8% THD)
Frequency response : 10Hz...60Khz (±3dB @ 1W output)
Damping factor : more than 22 (8 Ohm, 1Khz)
High filter : 6dB/oct. above 5Khz
Componentry : 19 transistors, 1 diode, 1 IC
PC : 70W maximum
Dimensions : 41 x 12 x 28cm
Weight : 6,2kg
TA-1055 features : DC coupled amp
IC preamplifier
2x rec outputs + DIN
front panel aux. jack
2 monitor switches
2x speaker pair outputs
headphone jack
high filter
loudness compensation
"attractive wooden cabinet included"
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