Agree: too much mass is detrimental

Posted by Al Sekela (A) on January 1, 2005 at 09:57:05

In Reply to: confessions of a former damping freak posted by tonemaniac on January 1, 2005 at 01:55:39:

Some damping materials are less effective on certain parts, so that adding enough of them to do some damping also increases the mass and lowers the resonant frequency.

My Atma-Sphere MA-1s are kits that I built on the old "DeLuxe" chassis (no longer available). They had large, heavy aluminum front panels and macho handles. When I started damping the chassis, I had positive results from damping the metal to which the tubes and transformers are mounted with Dynamat X-treme. However, adding this damping material to these heavy front panels served only to lower and purify their ringing tones. The sound got worse!

I removed the panels and handles, and made new covers for the fronts of the amps out of some Sonex foam and some frames cut from polypropylene sheets. This stuff is already damped by its nature. The sound got better!

There may be a more effective damping material for thick aluminum panels, but I'm happy with the sound I got from removing them altogether.

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Follow Ups Full Thread

Topic - teres turntable and C37 - jfrago_52@yahoo.com 23:41:48 12/29/04 (13)

Re: teres turntable and C37 - boll001@pol-it.org 01:34:44 01/07/05 (0)

Re: teres turntable and C37 - boll001@pol-it.org 01:31:02 01/07/05 (0)

Re: teres turntable and C37 - docktorbombay 16:47:22 12/30/04 (10)

have their machine shop cut you a brass top plate fpr the Pass amp - tonemaniac 06:14:57 12/31/04 (9)

Re: have their machine shop cut you a brass top plate fpr the Pass amp - jfrago_52@yahoo.com 10:52:49 12/31/04 (8)

Only one to to find out for real. Chances are the difference would be great - tonemaniac 12:14:34 12/31/04 (7)

Re: Only one to to find out for real. Chances are the difference would be great - jfrago_52@yahoo.com 12:18:21 12/31/04 (6)

Until then, try damping what you have. - Al Sekela 19:38:55 12/31/04 (5)

confessions of a former damping freak - tonemaniac 01:55:39 01/01/05 (4)

Agree: too much mass is detrimental - Al Sekela 09:57:05 01/01/05 (0)

Re: confessions of a former damping freak - jfrago_52@yahoo.com 02:32:11 01/01/05 (2)

this depends a lot on what and where - tonemaniac 13:05:34 01/01/05 (1)

Re: this depends a lot on what and where - jfrago_52@yahoo.com 14:13:05 01/01/05 (0)

Follow Ups

Agree: too much mass is detrimental - Al Sekela 09:57:05 01/01/05 (0)

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