Tube dampers on your tube s in you CDP or DAC?

I used both rubber and silicone dampers on a CJ dac and pre.They both worked great though the silicone did melt a tiny bit.Tightened up the sound and had better bass and highs.But tried them on my Vincent cdp and it just sounded constricted.

"I used both rubber and silicone dampers on a CJ dac and pre.They both worked great though the silicone did melt a tiny bit."

This is true, some will melt and adhere to the tube. Be wary of the cheap orange dampers sold on ebay. As I said before, I use Herbie's and they are very well constructed.
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I use them, not sure which ones, but these are massive and good.But I haven't noticed any improvements in sound at all, to be honest.