What Happens When Preamp Tubes Need Replacing?

When preamp tubes need replacing, how do you know? What are the tell-tale signs sonically and otherwise?

Thanks in advance.

elf7311-10-2008 3:05am

philjolet Details Discussions Posts This discussion Message User 2,305 posts 11-10-2008 at 04:37pm Copy Comment URL Report Comment Edit Delete old tubes make your rig sound boring and lifeless.