Intact Audio Based autoformer passive pre amp linestage volume control tube amp | eBay
The switches in the middle have 3 positions allowing +1.25dB, 0dB and -1.25dB modification of the overall level. The middle switch is a three input selector switch. Why does the AVC have 5 switches.
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I bought one of these. Opinions please. Obviously I'll give you my opinion after it arrives.