I'm currently using NOS RCA clear top 12au7 in my Audio Valve Eklipse preamp. Looking for a 12au7 that's more transparent, detailed, maybe higher resolution to try with this preamp. Not looking for a tubey sound. Thanks.
Believe it or not, the Sino/Chinese are very good and transparent. Unfortunately, they just do not last a long time...... 300 hours of so. They are worth it though. Quicksilver sells them for about 12-14.00ea. They are graded for low noise.
I would say the Telefunken are most like what you describe followed by Siemens. Andy at VTS is proabably your best source for honestly measured tubes that you can rely on - the guy knows his tubes and seems to be very honest in my experience.
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