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Old 01-29-2017, 08:58 AM
ariess ariess is offline
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Join Date: Jul 2012
Location: Baltimore
Posts: 714

Originally Posted by tima View Post
Fwiw, the manual says: "The vacuum tubes inside your Reference 10 are quality tubes and with normal use should not need to be changed for approximately 4,000 hours
of use."

Sometimes we don't recognize gradual changes occurring over time. Did you swap in a new pair of 6550s to compare to the one's with 2500 hrs on them?

I did. At 2500 hours they haven't lost anything compared to new ones.

What are others experience?
ARC Ref160 Monoblocks, ARC Reference 10 Preamp, Esoteric Grandioso P1X/D1X SACD/CD/DAC Stack, G1 Master Rubidium Clock, Aurender N100H, Bowers & Wilkins 800D3, Shunyata Triton V3, 3 Typhon QRs, Sigma NR power cables, Transparent Gen 5 Opus Speaker and XLR Cables, Shunyata Sigma Digital Clock Cable, Stillpoints Ultra 5 & SS, SR Blue Fuses
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