When do you change tubes on amplifiers?
Bought an Audio research VSI60 used 18 months ago. Have no idea the age of these tubs. Think the amplifier sounds good but maybe there is more sound hidden?
How do you know if drive tubs or power tubs need replacing?
I have 3 power tube sets for my PrimaLuna Dialogue integrated amp: Tung Sol KT120, Gold Lion KT77 and TungSol 7581A. Each produces a different sonic signature and I swap sets about every 3 to 4 months. Now that's rolling!
Titus, 6550 power tubes, correct? It's always a good idea to have a spare set on hand...you never know. So, try some new 6550s and see if you can hear a difference and like it. Tubes take a little burn in time, IMO these are probably "settled in" with 50 hours or less of play. Let us know what you do.
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