ONKYO A-812XG
¥ 39,800 (around 1989)
Commentary
A pre-main amplifier developed as a full-scale introduction to digital / AV.
Power supply circuit of the integra direct system or High fTDiscrete output stage using power transistor is adopted.
Equipped with a CD direct switch, it bypasses the input selector switches and tone control, and can amplify the pure music signal from the CD player by sending it to the power amplifier section. The CD terminal is gold-plated.
Equipped with Route 6 input terminals.
The Phono input is equipped with an MC/MM change-over switch so that an MC cartridge can also be used.
Equipped with Twin Turbo tone control, it is possible to enhance the ultra-low band around 50 hz, which is even lower than the normal Bass band of 100 hz.
Linear switching method is adopted to improve linearity.
Equipped with two speaker outputs, A, B, and A + B.
Uses a power cord with polarity display.
Equipped with delta turbo power supply to eliminate noise from AC line.
Model Rating
| Type | Pre-main amplifier |
| Rated output (20 Hz to 20 kHz CD → SP out, both channels driven) |
72W + 72W (6 Ω) 60W + 60W (8 Ω) |
| Dynamic Power | 78W + 78W (8 Ω) 135W + 135W (2 Ω) |
| Total harmonic distortion factor | 0.08% (8 Ω, 20 Hz to 20 kHz, CD → SP out, at rated output)) |
| Cross modulation distortion factor | 0.06% (20 Hz to 20 kHz, CD → SP out, at rated output) |
| Powerbandwidth | 5 Hz to 100 kHz (IHF -3dB, THD 0.2%, 8 Ω) |
| Damping factor (1 kHz, 8 Ω) | 40 |
| Frequency characteristic | Phono → Rec Out (RIAA deviation) : 20 Hz to 20 kHz ± 0.5 dB CD → SP out : 20 Hz ~ 100 kHz + 0 -3dB |
| Input Sensitivity / Impedance | Phono MM : 2.5mV/50k Ω Phono MC : 350 μ V/330 Ω CD, etc. : 150mV/50k Ω |
| Phono maximum allowable input (MM, 1 kHz) | 150mV |
| SN ratio (IHF-A filter input short) | Phono MM:83dB Phono MC:65dB CD and others : 97 dB |
| Tone Control Maximum Change | Treble : ± 10 dB (10 kHz) Bass : ± 10 dB (100 Hz) Twin Turbo : 50 Hz, ± 15 dB, 10 kHz, ± 6 dB |
| Muting | -20dB |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption (Electrical Appliance and Material Control Law) | 115W |
| External dimensions | Width 435x Height 119x Depth 272 mm |
| Weight | 6.7kg |