TRIO TW-80D
¥ 45,000 (released in 1966)
Commentary
The TW-80A -80A, this is a top-of-the-line stereo pre-main amplifier designed for more ideal original sound reproduction.
Mesa silicon transistors are used from the equalizer amplifier to the preamplifier.
We have improved various characteristics such as frequency characteristics, S / N ratio and damping factor by adopting a mesa silicon transistor that is resistant to heat and can be used semipermanently.
NF-type tone control is used for the tone control.
In addition, this tone control board is made into a block and can be removed with one touch.
The equalizer amplifier section uses a direct-coupled amplifier without capacitors or resistors to prevent the sound quality degradation that occurs when capacitors or resistors are inserted between stages.
It is equipped with a protection circuit that protects the power transistor and also repeatedly checks the safety of the circuit during its operation.
There is no need to worry about failure as it is a pure electronic type without using relays, etc.
There was a connection adapter with a DIN standard connector sold separately.
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Model Rating
| Type | Solid state stereo pre-main amplifier |
| Circuit system | Complimentary service OTL and ITL circuits |
| Effective power | 35W/35W (8 Ω, Strain 0.8%) |
| Music power | 40W + 40W (8 Ω, Strain 0.8%) |
| Frequency characteristic | 15 Hz to 50 kHz ± 0.5 dB |
| Output band characteristic | 18 Hz to 60 kHz -3dB |
| Distortion factor | 0.8% or Less (Output 35W/35W, 1 khz) 0.2% or Less (Output 20W/20W, 1 khz) 0.15% or Less (Output 0.1W/0.1W, 1 kHz) |
| Gain (output 32W, 1 kHz) | MAG1, 2 : 2.7 mV Tape HD:2.7mV Tuner, AUX, Tape Play : 150 mv |
| Tone control | 100 Hz : + / - 12 dB 10 kHz : ± 12 dB |
| Loudness control (Volume -30dB) | 100 Hz : 6 dB, 10 kHz : 3 dB |
| Equalizer | RIAA, NAB |
| High filter | 10kHz:-5dB |
| Low filter | 40Hz:-5dB |
| Signal-to-noise ratio Volume Max, Tone Control Flat |
MAG, Tape HD : 60 dB Tuner, AUX, Tape Play : 70 dB |
| Residual noise | 0.9 mV (8 Ω load, volume adjustment minimum) |
| Damping factor | 23 (8 Ω), 46 (16 Ω) |
| Accessory circuit | Protection circuit Tape monitor Stereo headphone jack High / low filter Loudness control NF Tone Control Phase switch Power supply voltage selector switch |
| Semiconductor used | Transistor : 21 Diode : 6 pcs Thermistor : 2 Varistor : 2 pieces |
| Power supply voltage | 100 VAC / 117 V, 50Hz/60Hz |
| Power consumption | 40W (at output 0) 160W (maximum output) |
| External dimensions | Width 388x Height 150x Depth 310 mm |
| Weight | 9.5kg |