AIWA S-P22
¥ 29,800 (around 1979)
Commentary
Stereo power amplifier of mini component my Pace5 series.
The circuit has a DC configuration and no capacitor is used in the negative feedback loop to solve the phase distortion problem.
Moreover, in order to suppress DC drift, a dual FET with good thermal coupling is used to realize stable operation even in a wide range of temperature changes.
The final stage adopts a pure complimentary service SEPP-OCL circuit of RET (ring emitter transistor) with good linearity.
The power supply uses a well-regulated toroidal transformer and a large capacitor.
It can also be used as a monaural power amplifier via BTL connection by switching the rear panel.
The protection circuit uses a newly developed IC and relay protection circuit.
The total power of both channels is the total power of both channels.
Model Rating
| Type | Stereo power amplifier |
| Circuit system | DC Configuration |
| Output | 30W + 30W (8 Ω, 0.04% distortion, 20 Hz to 20 kHz) 30W + 30W (4 Ω) 60W (8 Ω, BTL Connection) |
| Distortion factor | 0.02% (30W, 1 kHz) |
| Input Sensitivity / Impedance | 0.4V/47k Ω |
| Signal-to-noise ratio | 95dB |
| Damping factor | 45 or More (8 Ω, 1 kHz) |
| Semiconductor used | IC : 5 Transistor : 13 Diode : 13 pcs LED : 6 pcs |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 50W |
| External dimensions | Width 240x Height 72.3x Depth 223.6 mm (with Handle) |
| Weight | 3.8kg |
| Attachment | Stereo pin code Handle |