High-power AF amplifier (1)

EE May 1986 60 HIGH-POWER AF AMPLIFIER 1 Here is an amplifier that meets the demand for good quality sound reproduction at very high sound pressure levels Capable of delivering either 2x500 W in a stereo arrangement, or 1000 W in a bridge configuration, this design may be called powerful in the true sense of the word Technical characteristics Input sensitivity: 775 mVrms for maximum output power. Input impedance: power amplifier: 22 kg. 3dB bandwidth: Distortion: Damping factor: Features:* preamplifier: 47 kg.* 8 Hz...100 kHz. <0.1% at 1000 W in 8 g, or 2 x 500 W in 4 Q, or 2 x 250 W in 8 g; measured within 10 Hz. .30 kHz band. <0.01% at 600 W in 8 g, or 2 x 300 W in 4 g, or 2 x 200 W in 8 g; measured within 10 Hz. .30 kHz band. >100. mono/stereo selection on preamplifier with symmetrical or asymmetrical input and volume control. Transformer current limit at power-on; DC level monitoring at amplifier output; delayed loudspeaker connection; thermal control of fan relay. " to be dis...