Do tube dampers improve sound?

All I can say is, try it for yourself and see. I have used them on and off in my equipment, and there were occasions where I thought they made a nice improvement in focus and clarity on some tubes, but on other equipment it took the "life" out of the system. The dampers will be tube and equipment dependant.

I use the Herbies Audio Labs Hal-o dampers on the 6922 tubes in my ARC LS-15. They did make a difference. They cleared up the soundstage a little and separated things a little better, but don't expect night and day difference with 6922 tubes that are low noise and low microphony, such as carefully selected and properly matched set of EH6922 tubes for example. WHats good about Herbies, is they come off easily and the never stick to the tubes due to heat.
http://herbiesaudiolab.home.att.net/

I used Halos on my Tenor 75OTL's. The Halos made the single biggest sonic improvement I've ever heard in my system. It's astonishing how much distortion I believed was in the music was eliminated and enhanced clarity, detail and lower noise floor I got.

It was shocking. Now how do I fit tubes into those DarTZeel's?

Then I could improve it with Halo's...

It would seem that, as with most things, we just need to try the dampers out in our own systems to see if they make a positive difference. The Herbies do seem to be the way to go as the price is minimal and most of the posters in this thread have had a good experience with them.

Let us know what you decide to do, Vlad1456.

Holly

I'm trying Herbies Audio Labs Hal-o dampers the Black Nylatrons on my Aesthetix Calypso as I write... and so far so good. They quiet down the pre amp somewhat, unless I'm hearing things (that are not there) or is that... NOT hearing things that were there?! Anyway, I feel that they are a good value, so far. Now to try them on the Rhea phono amp.
Happy Listening!