Do tube dampers really work?

Marakanetz,

Tubes are microphonic in nature, try knocking anywhere near the tube socket.

Gnobber,
Up /down, lose/tight - the magnitude of damping.

Motdathird,

Can a metallic clamp added on a tuning fork prevent the tuning fork from vibrating when being stroke? A metal clamp will only change the resonance frequency.

If you want to know what HAL-O's do to the sound, check out their website. Many people describe what it does for their systems under the review section. You can find the website through the manufacturers list on Audiogon.

They have made a big difference in my system, particularly in 3D spacial characteristics.

I recently bought the new Pearl Tube dampers. I didn't notice any difference in the musical presentation, but what I did notice is the elimination of some minor microphonics of my NOS Telefunken E88CC's. Also, they significantly reduced the temperature of the tubes and this is a good thing - the tubes will last longer.

I have used the ARC rings with good results and as a result of this thread ordered the Hal-o rings from Herbie's, not to be confused with Herpes :)

These rings improve performance in several areas but might vary with the components they are used with. First there is a notable lack of microphonics in my new Supratek preamp which I recently received and which was a bit noisy at times, especially with those confounded but wonderful Ken Rad 6SN7 line tubes. The other area is clarity and image focus which I also noted with the ARC rings. They are well worth the expense and to answer your question, yes, they do work. As with all such things, YMMV. For the cost I would give them a try since there is no obligation if they don't. A cheap tweak worth the expense.

Hi Folks...

I'm from Israel, owning a ARC-SP-9/2 + a Dynaco Stereo 70 also series 2.

Thanks to a friend of mine that works for the Army, here..., I obtain from him a lot of "O" rings, widely used for many porpouses in the army, and loaded my Pre + amp with a lot of these "O" rings.

IF...?, I really hear a Improvement....Maybe I'm dreaming!

BUT... make me feel much better!

In those 2 Amperex white PQ 6922 that I installed in my SP-9/2 they obtain 3 "O" rings each one of the tubes.

My Dynaco the two drivers 6GH8A also 3 "O" rings each tube,
for the 4 National branded East Germany Siemens, as was received 16 "O" rings in total > 4 "O" rings each tube.

Of course...as here in Israel it's an a very hot zone..., my Dynaco always work with NO grille,,, the SP-9/2 With!

Good listening...

ALEX