Mapleshade brass tubedampers

The O ring idea fascinates me. it should be easy to figure out the problem is yo need somethe between the ring and the tube. Also if you could get them to cut short sections of reasonably large rings that can be sealed off you can make resonance dampers for speakers . I think resonance is good, as long as it does yield a distorted sound. I tell yo what we can find a smelter oif led to fill them have plastic caps melted onto the ends add a layer of iso damp and cork then prl kitchen flooring and finally a cup of ball bearings and charge 300% more than the cost.

Somebody must have tried a Roman ring...

The cheapest solution is the Silicon o-rings that you can get at McMaster. If you do some search on Tweak Asylum, you can find the information on the diameters for various tubes. Signal tube benefit the most from dampers. Several of my buddies have compared the McMaster o-rings and Hal-O dampers. The Hal-O damper has more air and details.

FrankC

O rings are certainly a cheap fix, grounded lead sheet is better and also cheap, but the massive brass ones are in a different league.

As you said, Piedpiper, you're a dealer.