YAMAHA CA-500Q
Price unknown (around the early 1970 s)
Commentary
Stereo pre-main amplifier with 4-channel quad riser.
In addition to the circuit configuration as a pre-main amplifier, the CA 500 q has a built-in matrix type quadlizer. By connecting an additional stereo amplifier, you can play four channels.
It is equipped with a separation mechanism for the preamp and main amplifier sections and a level selection switch (Rear Gain + 12 dB) mechanism. The main amplifier section can be used for both front and rear applications.
The function switch uses a push button.
Equipped with a tape monitor switch, high / low filter and loudness switch.
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Model Rating
| Type | Pre-main amplifier |
| Dynamic Power (IHF, 1 kHz) | 60W |
| Effective output (1 kHz, single-channel drive) | 22W/22W |
| Total harmonic distortion factor | 0.05% (at 1 khz, 20W output) |
| IM Distortion Factor (70 Hz : 7 kHz = 4 : 1) | 0.1% (at 20W output) |
| Power Bandwidth (IHF, 0.5% Distortion) | 18 Hz to 46 kHz |
| Input Sensitivity / Impedance | Phono : 3mV/50k Ω Aux, Tape PB (Pin), Rec PB (Din) : 200mV/50k Ω Main in : 775mV/50k Ω |
| Output terminal | Speaker jacks : 2 channels (A, B, A + B) Headphone port : 1 system Pre-out : 775mV/10k Ω Rec out (Pin) : 200mV/10k Ω Rec out (Din) : 30mV/80k Ω |
| Frequency characteristic | Phono : 30 Hz to 15 kHz ± 0.5 dB Aux, Tape PB, Rec PB : 20 Hz to 30 kHz + 1 -3dB Power Amplifier Part : 15 Hz ~ 50 kHz + 0 -3dB |
| Damping factor | 40 (8 Ω, 1 kHz) |
| Tone control | Bass : ± 10 dB (70 Hz) Treble : ± 10 dB (7 kHz) |
| Filter | Low : -3dB (70 Hz, 6dB/oct.) High : -3dB (7 kHz, 6dB/oct.) |
| Loudness control | + 8 dB at 70 Hz, + 6 dB at 10 kHz |
| Channel separation | 50dB(1kHz) |
| Accessory circuit | 4-ch decoder 4-ch matrix circuit sy power terminal 4 ch input terminal |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Maximum Power Consumption | 120W |
| External dimensions | Width 400x Height 140x Depth 300 mm |
| Weight | 8.0kg |