Tube dampers/coolers effect on preamp sound?

Has anyone heard a change in sound, good or bad, when using any kind of device that damps a tubes glass bottle in a preamp ?

rmcfee02-27-2013 3:55pm

syntax Details Discussions Posts This discussion Message User 2,193 posts 03-25-2013 at 07:21pm Copy Comment URL Report Comment Edit Delete Replace the cheap tube Sockets with Teflon units and you will get the best improvement.