TRIO TW-30
¥ 36,500 (around 1965?)
Commentary
Pre-main amplifier with all-transistor configuration.
The all-transistor configuration realizes the OTL system.
It is equipped with an output stabilizing circuit that prevents transistor breakage, output equalization and over damping.
The control unit is equipped with a dual volume for volume and balance adjustment, various filters and loudness control.
Model Rating
| Type | Solid state stereo pre-main amplifier |
| Output | Maximum : 12W + 12W at 1 kHz No distortion : 10W + 10W (1 kHz or less, 2% harmonic distortion) |
| Output side internal impedance | Approximately 3 Ω |
| Load impedance | 4 Ω ~ 16 Ω |
| Low power distortion | 0.35% or Less (1 kHz, 10 mW) |
| Gain (1 kHz input for 10W output) | MAG:3mV Aux(Tuner):100mV |
| Tone control | Bass : + 9 dB ~ -11dB (50 Hz) Treble : + 6 dB to -13dB at 10 kHz |
| Loudness control | + 9 dB (100 Hz), + 4 dB (10 kHz) |
| Rumble filter | -9dB(50Hz) |
| Scratch filter | -12dB(10kHz) |
| Equalizer | RIAA |
| Residual noise | 4 mv (16 Ω) |
| Startup time | About 1 second |
| Service limit temperature | 50 ° C |
| Semiconductors used | 22 units 2 Silicon Diodes (1S-100) 2SB257x2 2SB26x4 |
| External dimensions | Width 300x Height 83x Depth 200 mm |
| Weight | - |