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Original Message
How Do You Know It's the Tubes?
Posted by Triode_Kingdom on January 12, 2017 at 08:37:50:
Whan an amp or preamp doesn't sound right, the first thing I do is measure frequency response and distortion. It's a shot in the dark changing anything until that's done, and measurements are a lot cheaper than a quad of NOS 6SN7s.