Rsa, Mullard tubes and Telefunken are at opposite ends of the spectrum. Mullard are warm, smooth, with a classic tube sound. Telefunken are more detailed and open.
Both are expensive premium tubes and are a risk to purchase without knowing their sonic signature.
Brent Jessee provides a good reference for tube types, and how the different brands sound...
http://www.audiotubes.com/12ax7.htm
I'm a big fan of rolling tubes, but don't pay top dollar for NOS tubes without a recommendation.
Both are expensive premium tubes and are a risk to purchase without knowing their sonic signature.
Brent Jessee provides a good reference for tube types, and how the different brands sound...
http://www.audiotubes.com/12ax7.htm
I'm a big fan of rolling tubes, but don't pay top dollar for NOS tubes without a recommendation.