Do tube dampers improve sound?

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...