I'm still doin' pretty good with the stock EH 6922s in my Premier 17. I don't know if they've ever been replaced as I'm the second owner of this fine pre. I do want to get some GL 6922s in to try those out, or maybe some Ediswans.
The CT-5 hasn't been a problem, but I think I'm just now getting somewhere around the 1000 hr mark, and those 6H30/6N30s were specifically designed to be extremely durable, so no issues there.
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components.
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