AIWA AX-7500 Stereo Amplifier Receiver
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.