This was one of AIWA's most powerful amplifiers in 1976, producing an inspiring 110W musical power, rated at a more meaningfully quoted 30 watts (@ 8Ω) per channel. Although the MW radio receiver may not be that useful these days, it is the external inputs for an external turntable, tape input and auxiliary source that will be of most use to the modern collector. This amplifier unit will look impressively placed in a Danish-style teak shelving system.
110 Watts of musical power (@4Ω) • Highly sensitive stereo tuner with PLL circuit • OCL = equal current (= capacitor) coupled, complementary power amplifier circuit with asymmetrical push-pull output stage (= SEPP) • Function selection buttons for two tape inputs with monitor circuit, magnetic phono input can be controlled up to 200mV, AUX, AM and FM • afc = FM tuning can be switched off, reception instrument and FM radio zero crossing instrument • muting = switchable FM-mute tuning • loudness = proper volume control, can be switched off • microphone mix controller • two speaker groups, can be switched off • Ironless power amplifiers with short-circuit protection and other up to date properties.
Music performance: 110W@4Ω; 90W@8Ω
Sinusoidal power (both channels controlled according to DIN45500 1kHz): 2x33W@4Ω; 2x30W@8Ω
Power range: at 0.2% distortion factor: 10Hz to 50kHz
THD: at nominal power: 0.2%
Frequency range: Phono RIAA equalized 30Hz-15kHz ±3dB; AUX, Tape 1+2 (DIN) 10Hz-70kHz ±3dB
Semiconductors: 1 IC, 44 diodes, 1 FET
Power supply: 120 Watt
Dimensions: 150(H) x 450(B) x 300(I)mm
PLL circuit = FM sound decoder for optimal channel separation
The 19kHz pilot signal is compared in phase with the 38kHz switching signal. Hence the stability and excellent channel separation and low signal-to-noise ratio.
OCL circuit = capacitorless output circuit
A directly coupled, truly complementary power amplifier. Advantages: large bandwidth, dynamic range, low distortion. The equalizer or compensation amplifier is also designed as a directly coupled circuit
SEPP = Asymmetric push-pull circuit (single-end push-pull circuit)
The positive and negative pulses of the input signal are amplified separately in order to achieve an output power with a linear frequency range and low distortion.