Yeah, this looks nice!
So this is a standalone volume-/balance-control? (A passive pre, with tube-buffed?)
Edit: I just realized what you mean: the rubber-ring for the balance-control!
Yes, this is even cooler!
So this is a standalone volume-/balance-control? (A passive pre, with tube-buffed?)
Edit: I just realized what you mean: the rubber-ring for the balance-control!
Yes, this is even cooler!
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Tubes in a SE circuit can be unmatched L/R with no sonic penalty other than that the balance is off a little. So to set the balance put a signal generator through a Y cable to both channels, set the balance, lock it in with the rubber belt, done. Easier than testing 12 tubes to find a matching pair.