I have to agree with Jafox on this one, it's worth trying the inexpensive solution first. I got 50 industrial grade silicone o-rings from here:
http://www.marcorubber.com/material_selection.htm
for $10 plus shipping. I have a preamp with all octal tubes, so the S1000-216 o-rings were the perfect size. I use 2 per tube, and they make a noticeable difference in microphonics and smoothing out the bass, which is a little woolly without them. Would Herbie's or one of the other far more expensive dampers be better? Maybe, but I'm not sure my rig has enough resolution to prove it. I'm happy with my cheap o-rings.
Plus, you can get them in about 10 different colors to match your decor. :-)
http://www.marcorubber.com/material_selection.htm
for $10 plus shipping. I have a preamp with all octal tubes, so the S1000-216 o-rings were the perfect size. I use 2 per tube, and they make a noticeable difference in microphonics and smoothing out the bass, which is a little woolly without them. Would Herbie's or one of the other far more expensive dampers be better? Maybe, but I'm not sure my rig has enough resolution to prove it. I'm happy with my cheap o-rings.
Plus, you can get them in about 10 different colors to match your decor. :-)