More than 1 will deaden and over damp the tube.Herbie are the best because they don't over damp like all the others.
Anybody have ant thoughts re using 2 Herbie's tube dampers on 1 tube?
I'm already using Herbie's UltraSonic SS on the 6SN7s in my amp. I'm definitely happy and believe they make a positive difference. I've noticed that in some pictures of a number of tube amps that some folks are using more than one of the "rubber" style dampers on their tubes. Does anyone have any ideas?