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

orpheus10 Details Discussions Posts This discussion Message User 8,668 posts 08-28-2011 at 01:35pm Copy Comment URL Report Comment Edit Delete NOS tubes last much longer than new tubes. This is something else to factor in when considering cost.