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Sansui AU-111 integrated stereo amplifier (1965-1971) | |
The output stage consisted of fixed bias 6L6-GC's via Sansui's own SW-50 output transformers with cathode feedback design. In keeping with Sansui's valve tradition, the AU-111 was designed for the maximum capability of 6L6-GCs with 485V plate voltage yielding 40 watts RMS per channel at less than 0.8% THD. The preamplifier section consisted of a first stage cathode follower followed by three amplification stages to manage sophisticated tone controls, low/high filters, loudness and presence switches although the tone control circuit could be totally bypassed by the tone defeat switches. The phono equalizer stage utilised a solid-state circuit to improve signal to noise ratio. The earliest (and rarest) versions of the AU-111 have distinctive control knobs that were built in two parts and it was this model that established Sansui's black front-panel designs - a tradition that was continued for more than two decades. Priced at around $270 in the USA when
new, today you wouldn't see much change from $1,500.00 for a well-presented
and fully functional example. Recently I've seen pristine AU-111's reach
almost $2,000 on internet auction. |
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