330 watts per channel, minimum RMS, both channels driven, at 4 or 8 ohms, from 20 - 20,000 Hz, with no more than 0.03% total harmonic distortion.
Triple push-pull, Darlington-connected, pure-complementary OCL power amplifier. First-stage differential amplifier employs single-packaged matched transistors and current-mirror loading.Constant-voltage power supply and four 18,000 uF filter capacitors maintain low distortion under high-amplitude transient conditions. 12 power-level LED's per channel (24 total) with 3-step range selector. Phono equalizer employs two M47LP transistors in current-mirror loaded differential stage, contributing to 97 dB phono S/N ratio (IHF A, re 10 mv). SEPP phono output stage. Phono overload of 300 mV (1 kHz, RMS) assures very wide dynamic range. Switchable phono resistance and capacitance for matching cartridge characteristics. Steep-slope (-12 dB/oct) high and low filters. Baxandall-type bass/midrange/treble controls plus "Acoustic Control." Midrange control center frequency variable between 250 Hz and 5 kHz. Two-way tape dubbing. 26-position true
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attenuator volume control. Three-fold circuit and speaker protection. Automatic load impedance detector optimizes power transfer depending on speaker impedance. 8-gang variable tuning capacitor (5 for FM, 3 for AM). 4-pole MOS FET utilized in both RF and mixer stage. Local oscillator with FET buffer amp contributes to excellent spurious response rejection, wide dynamic range and high tolerance to strong input signals. 85 dB selectivity achieved with four 2-element "flat group delay" filters and double-tuned circuits in RF amplification stage. 19 and 38 kHz signal cancellors permit wide, flat frequency response in FM. Phase locked loop IC in FM MPX section for wideband, stable stereo separation. MPX hi-blend reduces noise on weak FM stereo signals. Ratio detector minimizes FM distortion, with high tolerance to overmodulated broadcast signals. In AM section, tuned RF amplification and triple-tuned coils in IF contribute to excellent selectivity. Main and remote speaker facilities. Jacks for adding future 4-channel FM and stereo AM adaptors. Pre-out/Main-in jacks.
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