TRIO TW-80A
¥ 45,000 (released in 1966)
Commentary
An all-transistor solid-state pre-main amplifier employing a mesa silicon transistor.
Mesa silicon and power and power transistors to achieve excellent frequency characteristics of up to 120 kHz.
In addition, distortion at low output is improved.
In addition to the OTL (Output Transformerless) method, the ITL (Input Transformerless) method, in which the transformer connecting the output transistor and driver stage is removed, realizes transformerless operation from input to output.
It refers to a safer circuit and provides double protection by a protection circuit.
This prevents damage to the power transistor when an excessive input is applied.
Two MAG input terminals are provided so that two players can be used.
In addition, it is equipped with a terminal that can be directly connected to the tape head to play back the tape, a tape monitor mechanism that can play while recording, a tuner input terminal and a spare terminal.
It is equipped with additional mechanisms such as phase switch, low and high frequency noise filter, loudness control, headphone jack, etc.
A DIN standard one connection adapter for connecting DIN standard connectors was sold separately.
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Model Rating
| Type | Solid-state stereo premain amplifier | ||||
| Output (1% distortion factor) | Music Power : 80W (40W + 40W) Effective output : 35W/35W |
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| Frequency Response (AUX → Output Terminal) | 20 Hz to 60 kHz ± 1 dB 10 Hz to 120 kHz ± 3 dB |
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| Distortion Factor (1 kHz) | Output 35W/35W : 1% or less Output 20W/20W : 0.2% or less Output 1W/1W : 0.1% or less Output 0.02W/0.02W : 0.2% or less |
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| Input Terminal / Gain (1 kHz input voltage required for each output of 40W) |
MAG1, 2 : 2 mV Tape Head:2mV AUX, Tuner, Tape Play : 200 mv |
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| Tone control | 50 Hz : + / - 12 dB 10 kHz : ± 10 dB |
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| Loudness control (Volume -30dB) | 100 Hz : + 10 dB, 10 kHz : + 5 dB | ||||
| High filter | 10 kHz, -13dB | ||||
| Low filter | 50 Hz, -13dB | ||||
| S/N ratio (volume max Tone Control Flat, Output 35W/35W) |
MAG Tape Head:60dB Tuner, AUX, Tape Play : 72 dB |
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| Residual noise | 3 mv (8 Ω load, minimum volume adjustment) | ||||
| Damping factor | 20 | ||||
| Accessory circuit | Protection circuit Tape monitor Stereo horn jack High filter Low filter Loudness control Power supply voltage selector switch |
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| Semiconductor used |
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| Power supply voltage | 100 VAC / 117 V, 50Hz/60Hz | ||||
| Power consumption | No input : 40W Maximum output : 160W |
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| External dimensions | Width 388x Height 150x Depth 310 mm | ||||
| Weight | 9.5kg | ||||
| Sold Separately | DIN Standard One Connection Adapter RP-1 (¥ 490) |