At normal listening levels it is dead quiet right at the speaker. For the going price of a used unit its almost a no brainer.
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It is indeed dead quiet even with 94dB speakers with ears right at the drivers. If you’re handy with soldering iron and can pay attention to details- you know tube gear run at extremely high voltages, you can upgrade the stock capacitors or have it done by an expert or Sophia Electric for even better sound quality.