SONY TA-3120F
¥ 75,000 (around 1969)
Commentary
As a top-of-the-line power amplifier available today, this is a stereo power amplifier developed using Sony's transistor development and manufacturing technology and circuit technology.
A direct coupling method is adopted in which all components are directly coupled except for the coupling capacitor between each stage as well as the output coupling capacitor.
For this reason, power, distortion characteristics, damping factor, etc. do not decrease to the ultra-low frequency range, and excellent characteristics are realized.
Equipped with a limiter switch so that it can be used as a 25W or 50W amplifier.
Two inputs can be used and switching is possible on the panel surface.
Equipped with a speaker change-over switch that can use 2 pairs of speakers.
Input level adjustment knob is mounted.
A special circuit is built in to protect the speaker during abnormal operation.
There was a wooden case and a mounting bracket sold separately.
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Model Rating
| Type | All-silicon transistor stereo power amplifier |
| Circuit system | Direct coupling system Quasi complimentary service SEPPP OTL circuit |
| Output | Dynamic power : 210W (IHF) Rated Output : 100W + 100W (Both channel operation) (Can be switched to 100W, 50W or 25W by the output limiter switch) |
| Output bandwidth | 8 Hz ~ 30 kHz (8 Ω, IHF) |
| Harmonic distortion factor (1 kHz) | 0.1% or Less (at Rated Output) 0.03% or less (at 1W output) |
| Cross modulation distortion factor (60Hz:7kHz=4:1) |
0.1% or Less (at Rated Output) 0.03% or less (at 1W output) |
| Frequency characteristic | 5 Hz ~ 200 kHz + 0 -2dB (at 1W output, at test / normal switch "TEST") |
| Input Sensitivity / Impedance | 1.4 V (Rated Output) / 75k Ω (With Level Adjustment) |
| Output terminal | Two speaker terminals |
| Residual noise | 0.003 μ W or Less (8 Ω) |
| Signal-to-noise ratio | 110 dB or more (closed circuit) |
| Damping factor | 200 or More (8 Ω, 1 kHz) |
| Semiconductor used | Transistor : 25 Diode : 22 pcs SCR : 1 |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power outlet | Total 300W Power switch interlock : 1 system Power switch not linked : 1 system |
| Power consumption | 300W |
| External dimensions | Width 400x Height 149x Depth 323 mm |
| Weight | 12.2kg |
| Attachment | 2 Pin Plugs 1 fuse (5A) Polishing Cloth x1 Piece |
| Sold Separately | Eurasian Cheek Finish Wooden Case TAC-1 (¥ 4,600) Mounting Bracket MB-5 (¥ 2,800) |