YAMAHA CA-X1
¥ 49,500 (around 1976)
Commentary
This pre-main amplifier was developed with the theme of "Silent and clear sound that expresses the reality of stage sound alive and hot".
For the CA-X1, a new measuring instrument has been introduced under the theme of reducing the absolute value of the distortion factor by one order of magnitude, realizing a distortion factor that is one order of magnitude lower than the conventional one.
The power amplifier section uses a pure complimentary service OCL circuit directly connected to all stages of differential-input power supplies with a current mirror circuit.
The equalizer amplifier uses a 4-stage differential input direct-coupled circuit that combines a current mirror circuit.
Equipped with a Rec out selector, you can record FM broadcasts while listening to a record.
Model Rating
| Type | Pre-main amplifier |
| Effective output (1 kHz, both channel drive) | 45W + 45W (8 Ω) 62W + 62W (4 Ω) |
| Dynamic Power (IHF) | 125W (8 Ω) 190W (4 Ω) |
| Total harmonic distortion factor | 0.01% (20 Hz to 20 kHz, 20W) 0.005% (1 kHz, 20W) |
| Power bandwidth (IHF) | 10 Hz to 50 kHz |
| Damping factor | 50 or More (1 kHz, 8 Ω) |
| Phono input sensitivity | 2.5mV |
| Phono maximum allowable input | 150mVrms(1kHz) |
| RIAA deviation | ± 0.3 dB |
| Tone control | Bass : ± 12 dB (50 Hz) Treble : ± 10 dB (10 kHz) |
| Low filter | 25 Hz, 12dB/oct. |
| Loudness | Switch-type |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 105W |
| External dimensions | Width 435x Height 160x Depth 345 mm |
| Weight | 8.7kg |