Sony TA-5650

Sony Wega V-4810

1 9 7 5 may 1975
1 9 7 8 1978

Sony's V-FET best-seller.

And the only V-FET amp holding one little unknown gem, too : 2SK63, small-size V-FET for low-power applications. The 2SK63 was used in the phono stage of the TA-5650 and nowhere else.

Since the TA-5650 was released last among Sony's 1st gen' V-FET amplifiers, this addition makes sense but Sony's discretion about it still seems a little... typical Sony !

As all of Sony's 1st gen' V-FET units, the diodes and some resistors MUST be changed otherwise they'll take the amp section away and quite rapidly.

Said diodes are the reason why many TA-5650 died all too quickly in the 1970s and 1980s : the V-FETs had nothing to do with it.
The same sad fate happened to many a TA-N88B ; the V-FETs again had strictly nothing to do with the failure(s). Why Sony didn't communicate on this is, again, typical Sony :)

Also, as all 1st generation Sony V-FET, do NOT use a variac when powering the amplifier for the first time !

Thanks to Mark (of both the 1976 Service and Owner's Manual are available in pristine quality on request from TVK.
Mark does "still view it (despite my Technics obsession) as the ultimate integrated amp."

The TA-5650 was briefly available as a Wega V-4810 : black-face with clearer sideburns. Very rare.

Sony TA-5650, image 1 Sony TA-5650, image 2 Sony TA-5650, image 3
Sony TA-5650 specifications
Title Value
Power output : 2x 70W (IHF, 4 Ohm)
2x 80W (IHF, 8 Ohm)
Continuous RMS : 2x 50W (20...20Khz, 8 Ohm)
Frequency response : 5Hz...40Khz
Power bandwidth : 2Hz...100Khz (-2dB)
THD : 0,1% (rated power)
0,08% (1W)
Damping factor : 50 (8 Ohm / 1Khz)
S/N ratio : 110dB
Residual noise : 0,02µW
S/N ratio : 70dB (Phono)
90dB (Tape, Aux)
RIAA deviation : ±0,2dB
Inputs : 2x Phono (2,5mV / 50kOhm)
3x Aux
1x Tuner
2x Tape (150mV / 250kOhm)
Outputs : 2 loudspeakers pairs (4 Ohm min.)
2x Tape (150mV / 4,7Ohm)
1x DIN (17mV / 42kOhm)
PRE OUT (150mV / 47kOhm)
Bass controls : ±10dB@100Hz or 50Hz
(turnovers : 500Hz or 250Hz)
Treble controls : ±10dB@10Khz (turnover : 2,5Khz)
±6,5dB@ 20Khz (turnovers : 5Khz)
Low filter : 12dB/oct. above 30Hz
High filter : 12dB/oct. below 9Khz
Loudness : +10dB@50Hz
Componentry : 10 V-FETs
8 FETs
42 transistors
31 diodes
PC : 440Watt
Dimensions : 43 x 16,8 x 32,3cm
Weight : 12,5kg.
Sony TA-5650 : 1 topic
(last updated topic shows up first)
  • SONY TA-5650                             (5)last updated by Tim5 - 24/12/2012, 12H12
page online since : 2005
page updated : not yet
page type : LGT / KNB
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