Sony TA-3120

Sony TA-3120A

December
1 9 6 6 december 1966
April
1 9 6 7 april 1967
1 9 7 1 1971

Bestselling third-width power amp made for multi-amped speakers -as seen in many late 1960s and early 1970s japanese rigs- with a 100Khz (3120) or 180Khz (3120A) response.

The two versions look identical but the later "A" sees much improved THD specifications, a damping factor closer to that of the TA-3060, slightly modified power PCB and no front "safety" LED. That version was launched at the same time as the "A" version of the TA-1120.

A back switch activates a low-cut filtering everything below 30Hz (3120) or 15Hz (3120A) ; the "test" position allows response to go naturally down to 10Hz for both versions.

Each 3120 and 3120A was delivered with an individual inspection cards stamped by Mr K. Ishikawa ; cards spotted throughout the years invariably show residual noise as low as 0,0017µW, THD as low as 0,027% at 50mW or 0,03% at rated output - even better than the official specifications.

(images shown here are of the original 3120, from the japanese and canadian dedicated catalogs)

Sony TA-3120, image 1 Sony TA-3120, image 2 Sony TA-3120, image 3
Sony TA-3120 specifications
Title Value
TA-3120 (3120A specs added in white TA-3120 (3120A specs added in white)
Type : all-silicon transistor amplifier
quasi-complementary symmetry
Non-clip music power output : 160W (8 Ohm, both channels driven)
Music power IHFM : 120W (8 Ohm, both channels driven, ± 0,5dB)
Rated output : 2x 60W (4 Ohm, ± 0,5dB)
2x 50W (8 Ohm, ± 0,5dB)
2x 35W (16 Ohm, ± 0,5dB)
THD : < 0,1% (rated output, 1Khz)
< 0,05% (rated output, 1Khz)
< 0,07% (25W output, 1Khz)
< 0,01% (10W output, 1Khz)
< 0,05% (500mW output, 1Khz)
< 0,5% (rated output, 20Hz...80Khz)
< 0,2% (rated output, 20Hz...15Khz)
< 0,06% (25W output, 20Hz...15Khz)
< 0,03% (500mW output, 20Hz...15Khz)
IMD : < 0,3% (rated output)
Frequency response : 30Hz...100Khz (+0 / -1dB, "normal")
10Hz...100Khz (+0 / -1dB "test")
7Hz...180Khz (+0 / -1dB, "normal")
15Hz...180Khz (+0 / -1dB "test")
S/N ratio : 110dB (IHFM, through wtd network as per ASAZ 24.3 - 1944)
Input : 1V / 100kOhm (for 50W output)
Damping factor : > 70 (1Khz, 8 Ohm)
180 (1Khz, 8 Ohm)
360 (1Khz, 16 Ohm)
Low filter : 6dB/octave below 30Hz
6dB/octave below 15Hz
PC : 30W idle
250W maximum
Dimensions : 18 x 14,5 x 44,5cm
Weight : 8kg.
List price : 52,000¥ (3120 / 3120A)
Sony TA-3120 : 0 topic
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page online since : may 2012
page updated : not yet
page type : LGT / KNB
page weight : 148.27 Kb / 0 b

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