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

lowrider57 Details Discussions Posts This discussion Message User 5,417 posts 03-07-2013 at 08:53pm Copy Comment URL Report Comment Edit Delete Audiolabyrinth, I use herbie's dampers on a Jolida cd with 12AX7s. Result was more focused image, tighter bass. But again, the placement of the damper is important; for me it is near the top of the tube, level with the top of the plates.
ebm Details Discussions Posts This discussion Message User 9,311 posts 03-10-2013 at 01:45pm Copy Comment URL Report Comment Edit Delete Herbies top of the line better bass quieter etc.
pjudice Details Discussions Posts This discussion Message User 5 posts 03-24-2013 at 04:22pm Copy Comment URL Report Comment Edit Delete I found this article in Stereophile about Audio Research tube dampers? I've tried to locate a seller online, but haven't had any luck. The AR website isn't very helpful. Anyone know where to find these or have any experience with them? http://www.stereophile.com/content/audio-research-reference-phono-preamplifier-audio-research-tube-damping-rings
mofimadness Details Discussions Posts This discussion Message User 4,982 posts 03-25-2013 at 02:54pm Copy Comment URL Report Comment Edit Delete Have you tried calling Audio Research direct or an ARC dealer?
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.