Quote:
Originally Posted by cleeds
Noise that can only be heard by putting my ear up to a midrange driver doesn't trouble me. If a tube does develop an issue, I replace all four of the signal tubes at the same time. I reason that once one fails the remainder cannot be far behind and there's no fun in fiddling with them. If the tubes reach around 5,000 hours with no issue I simply replace them all prophylactically.
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Thank you, Cleeds. Sound logic. But I do like to fiddle from time to time and isolated V1 as the noise maker. I am surprised to hear how good the system continues to sound with the "old" 6h30s installed. They came out of my prior LS 25II. Nevertheless, after the first of the year I will be ordering a complete new tube set for the unit.