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

rmcfee OP Details Discussions Posts This discussion Message User 26 posts 02-28-2013 at 01:11am Copy Comment URL Report Comment Edit Delete Thanks MOFI. Can you describe the improvement at all?
rmcfee OP Details Discussions Posts This discussion Message User 26 posts 02-28-2013 at 02:02pm Copy Comment URL Report Comment Edit Delete I have heard one person say that they heard a reduction in openness and soundstage when using a damper. Any opinions of this?
rmcfee OP Details Discussions Posts This discussion Message User 26 posts 03-01-2013 at 01:22pm Copy Comment URL Report Comment Edit Delete I am using a Joule Electra OBS-1 which has 6 tubes in the preamp part and more in the power supply but I wouldn't think that they would affect sound (I could be wrong). I think of old Fender Teles with microphonic bridge pickups- the microphonics add a nice part of the tone but once it gets loud they screech and are a problem. Maybe damping a tube (even if it is not noticably microphonic) could take something away from the sound. And yes,I know, tubes are not electric guitar pickups.