Assuming approximately 28 hours a week listening (4 hours per day average), and using the lowest 6000 hour number Ron stated, you are looking at 4.15 years before tube replacement. If you listen more hours per day (my system is on approximately 14 hours per day) then your tube replacements will happen sooner. If you are lucky with your tubes, and exceed 6000 hours, consider yourself fortunate, but have a handy $2k standing by. So set aside $450 each year for the care and feeding of a pair of MC2301, and you should be good.
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Dan
STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario
LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113
VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A
Last edited by jdandy; 08-11-2009 at 08:35 PM.
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