YAMAHA CA-1000II
¥ 125,000 (around 1976)
Commentary
Pre-main amplifier which is an improved version of CA-1000.
The power amplifier section uses a pure complimentary service OCL circuit directly connected to all stages.
The equalizer amplifier consists of an input stage using Yamaha's original dual FET and a class A SEPP output stage using a transistor.
Built-in class-A / class-B switching circuit provides high output for class-B and high transparency for class-A.
All circuits are analyzed by CAD method using a computer.
Model Rating
| Type | Pre-main amplifier |
| Effective output (1 kHz, both channel drive) | Class B Operation : 80W + 80W (8 Ω) Class A Operation : 15W + 15W (8 Ω) |
| Dynamic Power (IHF) | 200W (Class B) |
| Total harmonic distortion factor (20 Hz to 20 kHz, 1 kHz) | Class B operation : 0.04% Class A operation : 0.02% |
| Power bandwidth (IHF) | 5 Hz ~ 50 kHz (Class B) |
| Damping factor | 70 or More (1 kHz, 8 Ω) |
| Phono circuit | 2 Systems, 3 mv, 200 μ V (MC) |
| Phono maximum allowable input (1 kHz) | 310mVrms |
| RIAA deviation | + / - 0.2 dB |
| Tone control | Bass : 50 Hz ± 15 dB Treble : 10 kHz ± 10 dB |
| Low filter | 20Hz/70Hz, 12dB/oct. |
| High filter | 6kHz/12kHz, 6dB/oct. |
| Loudness | Continuous loudness |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 195W |
| External dimensions | Width 436x Height 144x Depth 323 mm |
| Weight | 15.5kg |