I have a pre-amplifier that can use either 6 SN7 or 12SN7 ( with jumpers on the circuit board). The manufacturer suggests there is little sonic difference between the two ( within same branding and era etc). Has anyone direct experience with these two tubes?
I have a tube preamp that has a switch for 6 or 12V heater and I have several 6 and 12SN7’s. To me they sound about exactly the same but I swear my mind tells me the 12SN7 has the edge, they just sound a little better to me.
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