When to replace pre-amp tube?

Hi, I'm a tube dummy and want to know when would I need to replace the tubes on my MF Nu-vista M3 integrated amp. Thanks.

thuhaile08-25-2011 7:27pm

swampwalker Details Discussions Posts This discussion Message User 5,138 posts 08-26-2011 at 02:40am Copy Comment URL Report Comment Edit Delete IIRC, the nuvistor tubes are very long lasting. Yep, here it is, S'phile review of Nuvistor amp says "Typical tube life expectancy is about 100,000 hours, and the failure rate, with almost 1500 Nu-Vista products now in the field, is "about 0.1%." So don't worry. " lets see, 100k hrs = 24/7 for 11.5 yrs.