TRIO KA-8100
¥ 63,000 (released in 1978)
Commentary
High-speed DC integrated amplifier.
A newly developed high-speed circuit has been adopted to improve the waveform collapse and turbulence that are likely to occur at high speed.
A straight DC amplifier configuration is adopted without a low-frequency cut capacitor in the signal path from the Tuner (Aux) terminal to the SP terminal or in the NF loop.
The MC head amplifier section adopts a complimentary service push-pull circuit for all stages using a low-noise transistor for the first stage.
The power supply section uses a large power transformer and four 6,800 μ F high-capacity electrolytic capacitors, and two power supplies on the left and right sides to reduce mutual interference.
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Model Rating
| Type | Integrated amplifier | ||
| Rated output (phono → sp terminal, both channel operation) |
60W + 60W (8 Ω, 20 Hz to 20 kHz) 65W + 65W (8 ohm, 1 khz) |
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| Total harmonic distortion factor (8 Ω) |
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| Cross modulation distortion factor | Tuner, Aux, Tape → SP terminal : 0.004% (at rated output, 8 Ω, 60 hz : 7 khz = 4 : 1) | ||
| Frequency characteristic | Tuner, Aux, Tape → SP jacks (straight DC on) : DC ~ 400 khz -3dB Tuner, Aux, Tape to SP jacks (straight DC off) : 18 Hz to 400 kHz -3dB |
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| Output Bandwidth (IHF) | Tuner, Aux, Tape → SP terminal : 5 Hz ~ 40 kHz (8 Ω at 0.03% distortion rate) | ||
| Damping factor | 100 (Tuner, Aux, Tape to SP terminal, DC to 20 kHz, 8 Ω) | ||
| Input Sensitivity / Impedance | Phono MM → SP Terminal : 2.5mV/50k Ω Phono MC → SP Terminal : 0.1mV/100 Ω Tuner, Aux, Tape → SP terminal : 200mV/50k Ω |
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| Signal-to-noise ratio (IHF-A) | Phono → SP Terminal : 87 dB (2.5 mV input) Phono MC → SP terminal : 68 dB (0.1 mV input) Tuner, Aux, Tape → SP terminal : 110 db |
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| Tone control (Tuner, Aux, Tape → SP connector) |
Bass : ± 7.5 dB (100 Hz) Treble : ± 7.5 dB (10 kHz) |
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| Loudness control | + 3 db, + 6 db (Tuner, Aux, Tape → SP terminal) | ||
| Transient response | Rise time : 0.9 μ s (Tuner, Aux, Tape → SP terminal) Slew rate : ± 110 V / μ s (Tuner, Aux, Tape → SP terminal) |
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| Phono maximum allowable input (Rec out, 1 kHz) |
MM : 220 mV (distortion rate 0.01%) MC : 8 mv (Distortion rate 0.01%) |
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| Phono RIAA deviation | 20 Hz to 20 kHz ± 0.3 mV | ||
| Output Level / Impedance | Tapre rec pin : 200mV/120 Ω | ||
| Power outlet | Power switch interlock : 2 systems Power switch not linked : 1 system |
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| Power supply voltage | 100 VAC, 50Hz/60Hz | ||
| Rated power consumption | 150W (Electrical Appliance and Material Control Law) | ||
| External dimensions | Width 440x Height 153 (146) x Depth 403 mm | ||
| Weight | 11.5kg |