Herbie's Hal-O tube dampener's on Calypso?

Unfortunately, I just haven't had much time to sit down for critical listening under what I consider "proper" conditions. That's not to say that I haven't done any listening. With that being said, I haven't noticed any detrimental effects of the Hal-O's that have made me want to pull them off the pre. I installed them all the way at the top of the tubes and perhaps I will play with placement a bit in the coming weeks. I don't listen to music during the week, so hopefully I will get plenty of hi-fi time this coming weekend...

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. :-)

That's outstanding info, Armstrod. Thank you.