How long will tubes last in a pre-amp?

My Sonic frontiers Line One seems fine, tho I haven't put anything else in place of it to test.

It is a decade or more old. Should I get worried about the tubes?

randy-1111-07-2016 4:30am

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randy-11 OP Details Discussions Posts This discussion 1,913 posts 11-07-2016 at 04:31pm Copy Comment URL Report Comment Edit Delete What does "wear them down" mean?
arcticdeth Details Discussions Posts This discussion Message User 1,549 posts 11-07-2016 at 04:42pm Copy Comment URL Report Comment Edit Delete I am still considering the CJ classic 2 SE Preamp just not sure about having a tube. S is so much easier.
noromance Details Discussions Posts This discussion Message User 9,547 posts 11-07-2016 at 05:04pm Copy Comment URL Report Comment Edit Delete Randy...look up cathode depletion.
randy-11 OP Details Discussions Posts This discussion 1,913 posts 11-07-2016 at 06:12pm Copy Comment URL Report Comment Edit Delete I'm aware of cathode depletion, but by that time, the tube would usually fail completely, not just show degraded SQ, AFAIK.
ahendler Details Discussions Posts This discussion Message User 416 posts 11-07-2016 at 07:46pm Copy Comment URL Report Comment Edit Delete Preamp tubes for the average use listener should last 10 to 20 years Left a 12ax7 on 24/7 for 10 years and it still tested good Alan

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