How long do NOS 6L6gc power tubes last in a Mcintosh MC240 amp?

I just ordered a quad of NOS tubes for the MC240, how long should they last? I listen for 1-2 hours a day, low-medium volume...

garthb30905-27-2020 12:11am

garthb309 OP Details Discussions Posts This discussion Message User 48 posts 05-28-2020 at 08:25pm Copy Comment URL Report Comment Edit Delete Thanks @johnss and @tomic601, I have Klipsch heritage Belle speakers, and just ordered replacement tubes from Brent Jessee.