AIWA S-P7
¥ 36,000 (around 1979)
Commentary
Mini Component My Pace Series stereo power amplifier.
The DC amplifier configuration does not use a capacitor in the negative feedback loop.
In addition, in order to suppress DC drift, a dual FET with good thermal coupling is used to realize stable operation even under a wide range of temperature changes.
The final stage adopts a pure complimentary service SEPPOCL small circuit of RET (ring emitter transistor) with excellent linearity.
The power supply section uses a toroidal transformer with excellent regulation characteristics and a large-capacity capacitor to provide sufficient power supply even at the time of effective output.
We have adopted a protective circuit using newly developed ICs and relays.
Special consideration is given to cutting shock noise when the power is turned ON/OFF, protecting the transistor by shorting, and instantaneously disconnecting the speaker when DC appears.
There are two types of speaker output, which can be used simultaneously.
It has a power indicator with a 9-point red LED as a meter.
The output is displayed using a logarithmic compression circuit and is 0.1, 0.2, 0.5, 1, 3, 10, 20, 50, and 100W.
Model Rating
| Type | Stereo power amplifier |
| Circuit system | FET input, 2-stage differential SEPPOCL circuit, DC configuration |
| Effective power | 50W + 50W (20 Hz to 20 kHz, double-channel drive, 8 Ω) |
| Harmonic distortion factor | 0.01% (8 Ω at rated output) |
| Output bandwidth | 10 to 50 kHz (IHF) |
| Signal-to-noise ratio | 115dB |
| Damping factor | 40 or More (1 kHz) |
| Input terminal | Input : 800mV/47k Ω |
| Output terminal | Speaker AORb : 4 Ω ~ 16 Ω Speaker A + B : 8 Ω ~ 16 Ω Headphone : 1mW/8 Ω |
| Power consumption | 120w |
| External dimensions | Width 250x Height 71x Depth 247.5 mm |
| Weight | 5.4kg |
| Attachment | Stereo pin code |