Tube dampers/coolers effect on preamp sound?

I also use Herbie's Tube Dampers in my preamp (4 tubes) and the result was a tighter bass.

"I have heard one person say that they heard a reduction in openness and soundstage when using a damper. Any opinions of this?"

Results may vary on each system; I haven't heard, that but I know from experience that postion of the damper on the glass tube will produce a different effect. Herbie recommends placement 1/3 down the tube.
Why not google Herbie's audio lab... there is a Q & A section.

Kernelbob, Herbie's makes dampers for IC connectors, but please explain to me how and why you damp speaker cables. I'm still not sold on the effectiveness of the IC dampers, but what are your findings with your speaker cables?

thanks... and I'm a faithful Herbie customer.

" If you hold your speaker cable while the music is playing, do you feel any vibration?"

No, I dont feel any vibration in the cable, but I wonder if Steve (Herbie) is right about vibration on the connectors, especially a RCA on a IC?

Every Herbie's tweek I have used has resulted in a noticeably improved performance. The tube dampers being the most jaw-dropping improvement.

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.