SONY TA-F333ES
¥ 79,800 (released in 1984)
Commentary
This pre-main amplifier was created to meet the standard with the diversification of program sources.
An audio current transfer system is adopted.
A current conversion amplifier is inserted between the preamp section and the power amplifier section. The output of the preamp section, which comes out as a voltage signal, is first converted into a current signal, and then returned to a voltage signal by a linear gain control attenuator installed at the final stage of the current conversion amplifier.
As a result, the preamplifier has infinite impedance as seen from the power amplifier and is completely electrically isolated.
At the same time, the L and R channels are separated, making it possible to pursue the characteristics of each pre-power and L and R independently.
In addition, noise pollution factors such as contact resistance of switches and connectors connectors and the intrinsic impedance of wires can be ignored.
A linear gain control attenuator based on the audio current transfer method is used in the volume for volume adjustment, and various characteristics are improved.
The power amplifier uses an ES filter to eliminate power source interference, and a super legato linear system to reduce switching distortion and crossover distortion at the output stage of the power amplifier over a wide band.
In addition to the audio input of the Line 5, it is equipped with two video inputs, and video dubbing is also possible.
It is also equipped with a Monitor TV Out connector to which a monitor TV can be connected.
The phono equalizer amplifier compatible with the MC cartridge has an excellent high-frequency response and employs a low-noise Hi gmFET to eliminate TIM distortion.
In addition to these products, we have adopted wiring materials using LC-OFC, and introduced parts such as high-rigidity copper-plated chassis that reduces magnetic distortion, large-capacity capacitors, and large heat sinks with high heat radiation.
Equipped with a standby indicator that blinks to indicate the muting status until the amplifier moves to stable operation after power is turned on.
Equipped with a cartridge load selector that can also connect to MC cartridges (40 Ω / 3 Ω).
Equipped with a speaker A/B/OFF changeover switch and a direct switch that passes through the tone control circuit.
Equipped with speaker protection circuit.
There was a side wood sold separately.
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Model Rating
| Type | Stereo pre-main amplifier |
| Rated output | 140W + 140W (20 Hz to 20000 Hz, 0.008%, 4 Ω) |
| Harmonic distortion factor | 0.002% (8 Ω, 10W) |
| Signal-to-noise ratio | Phono MM:83dB Phono MC:71dB |
| Dynamic range | 120dB |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 248W |
| External dimensions | Width 430x Height 135x Depth 425 mm |
| Weight | 13.5kg |
| Sold Separately | Sidewood TAC-125 (¥ 4,400) |