SONY TA-1150
¥ 49,800 (released in 1973)
Commentary
This is a stereo pre-main amplifier developed with the utmost effort to design a circuit that does not produce sound and does not color sound.
The power amplifier section uses a differential amplifier, two power supplies directly connected to all stages, and a pure complimentary service / para-push circuit.
The output stage employs a parallel push circuit that uses highly reliable high-output transistors to drive the speakers even under low impedance loads.
The preamplifier circuit uses a high-voltage low-noise IC developed by Sony's semiconductor engineering team for the equalizer and tone amplifier.
These ICs have improved linearity and distortion factor characteristics by designing differential amplifier circuits and complimentary service circuits.
The volume knob not only adjusts the volume of the main unit, but can also be used as a 4-channel master volume with a simple connection.
The tone control uses the NFB method, which has good characteristics and low distortion. The turnover and roll-off frequencies can be switched between two stages, Treble and Bass.
Equipped with an all-push button input selector that can be selected with one touch and without going through unnecessary input terminals.
Center channel terminal is mounted.
Equipped with a change-over switch that can use 2 pairs of speakers.
Equipped with a front input terminal (AUX2), which is convenient for temporary use of a tuner deck, etc.
Pre-power and power can be connected and disconnected.
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Model Rating
| Type | All-silicon transistor stereo premain amplifier | ||||||||
| Circuit system |
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| Power Amplifier Unit | |||||||||
| Output (0.1% harmonic distortion factor) |
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| Output band characteristic | 8 Hz to 35 kHz (8 Ω, IHF) | ||||||||
| Harmonic distortion factor | 0.2% or Less (Rated Output) 0.1% or Less (at 1W Output) |
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| Cross modulation distortion factor (60Hz:7kHz=4:1) |
0.2% or Less (Rated Output) 0.1% or Less (at 1W Output) |
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| Frequency characteristic | 12 Hz ~ 150 kHz, + 0 -2dB at 1W Output | ||||||||
| Input Sensitivity / Impedance | Power Amp Input : 0.8V/50k Ω (at rated output) | ||||||||
| Output terminal | Speaker : 2 lines Headphone : Load impedance 8 Ω or more Center Channel Out : 0.8V/680 Ω |
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| Damping factor | 100 or More (1 kHz, 8 Ω) | ||||||||
| Signal-to-noise ratio | 110 dB or more (closed circuit, IHF, A-network used) | ||||||||
| Residual noise | 0.05 μ W or Less (IHF, A Network Used, 8 Ω) | ||||||||
| Preamplifier Section | |||||||||
| Input Sensitivity / Impedance | Phono1, 2 : 2mV/47k Ω Tuner, AUX1, 2, Tape1, 2, Rec/PB (input) : 140mV/50k Ω |
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| Maximum allowable input | Phono1, 2 : 70 mV | ||||||||
| Output Level / Impedance | Pre Amp Output : 0.8V/2.7k Ω Rec Out1, 2 : 140mV/10k Ω Rec/PB (Output Part) : 24mV/82k Ω |
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| Harmonic distortion factor | 0.1% or Less (1 kHz, Rated Output) | ||||||||
| Cross modulation distortion factor | 0.1% or Less (at Rated Output, 60 hz : 7 khz = 4 : 1) | ||||||||
| Frequency characteristic | Phono1 and 2 : RIAA curve ± 1 dB Tuner, AUX1, 2, Tape1, 2, Rec/PB (Input) : 15 Hz to 80 kHz, ± 2 dB |
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| Loudness control (Volume -30dB) |
50Hz:+10dB 10kHz:+3dB |
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| Tone control |
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| Filter | Low Filter : 100 Hz or less, 6dB/oct. High Filter : 5 kHz or higher, 6dB/oct. |
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| Signal-to-noise ratio | Phono1, 2 : 70 dB or more (input 2 mV, B network) Tuner, AUX1, 2, Tape1, 2, Rec/PB (Input) : 90 dB or More (Input 140 mV, A Network) |
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| <General> | |||||||||
| Semiconductor used | Transistor : 33 Diode : 4 |
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| Pwer | 100 VAC, 50Hz/60Hz | ||||||||
| Power outlet | 2 connected to power switch, total 200W Power switch and ratio link x1, 300W |
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| Power consumption | 120W | ||||||||
| External dimensions | Width 400x Height 149x Depth 316 mm | ||||||||
| Weight | 8.3kg | ||||||||
| Attachment | 2 short plugs | ||||||||
| Sold Separately | Walnut Finish Wooden Case TAC-IN (¥ 3,000) | ||||||||