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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georgehifi Details Discussions Posts This discussion 10,312 posts 11-07-2016 at 05:18am Copy Comment URL Report Comment Edit Delete Preamp tubes are not too stressed, they can last a very long time, except in this one I know of, Audible Illusions 3A they ran them very hard. https://www.google.com.au/search?q=Audible+Illusions+3a+preamp&espv=2&biw=1680&bih=944&source=lnms&sa=X&ved=0ahUKEwiAvLuw85XQAhWEpZQKHYh8Bc4Q_AUIBSgA&dpr=1#q=Audible+Illusions+3a+eats+tubes Check for micro-phonics though by gently flicking the top of each tube with the finger nail while at normal listening level, have some one listen at the speakers, very small noise is normal, loud ones can mean this tube has gone miro-phonic.
hansk46 Details Discussions Posts This discussion Message User 122 posts 11-07-2016 at 07:39am Copy Comment URL Report Comment Edit Delete In my ARC REF 3SE I replaced all the small tubes by 6H30P-DR , they should last more than 10.000 hrs.
yogiboy Details Discussions Posts This discussion Message User 5,701 posts 11-07-2016 at 10:28am Copy Comment URL Report Comment Edit Delete Why not replace them? Preamp tubes are inexpensive. Ten years of use with any tube will wear down!
ebm Details Discussions Posts This discussion Message User 9,311 posts 11-07-2016 at 01:48pm Copy Comment URL Report Comment Edit Delete Every pre- amp is different usually 5 to 10 thousand hours but it depends on the voltage they run at.
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?

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