Michael Green of MGD fame spoke to me about this during a conversation. While he wasn't specifically talking about Classe' amps, he mentioned that things of this nature DO greatly contribute to the sonics of components. In one specific case, he was brought in by an un-named manufacturer or electronics as a consultant. It seems that they were intrigued by his theories and wanted to see what "knowledge" he could pass onto them in terms of improving their products. I guess that they had a nagging problem with a specific amp sounding "metalic" and having a ringing or "glare" problem. Michael told them to "re-resonate" their heatsinks and the problem would disappear. The only thing that "disappeared" was Michael out the door. The electrical engineers just about shoved him out of the place at a high rate of speed. I guess that they thought his theory was just a little "bunk". Sean
Sean (Threads | Answers | This Thread)
Jazz: I read somewhere on the web that owners of the Bel Canto EVO amp have had good results damping the sinks as well as other parts. The info may be at Audio Asylum (though I am not certain) and there was mention of specific materials that worked well that you may want to try.
Dekay (System | Threads | Answers | This Thread)
I think I read somewhere that one of the tweaks employed in
the Belles "hot rod" version amp was dampning material for heat sinks. Perhaps a Belles amp owner would comment on this.
Megasam (Reviews | Threads | Answers | This Thread)
I must admit that I have never heard of this. Intriguing idea. I have a Classe CA-300 that I am using in stereo to power the bass woofers of my speakers. After reading you post, I tried the ping test and it seems that they do resonate. The amp sits on an amp stand so dampening the heat sinks are going to be a bit tricky. I'll report back any findings. Thanks for your post! Regards; -Jerie
Jerie (Threads | Answers | This Thread)
If you go to Soundstage.com and look at the review for the Belles Hotrod amp, the reviewer suggests putting rope caulking material on the underside of the fins. I just bought a box at Sears Hardware for $3.50 and am going to try it.
Lphunter2 (Answers | This Thread)
I have a Forte 4a and the comment on the heatsinks ringing was made by a reviewer back whenever... I put small bits of sorbothane on the corners of each fin.
Elizabeth (Threads | Answers | This Thread)
The Belles Hot Rod employs Cramolin damping compound to damp resonances. Andy Bartha sells something he calls "whatchamacallits" (I don't know what these are, nor how to access his website, although he supposedly has one) anyway these are also used for heatsink resonance damping. Might be worth a call to 954-583-7866 to find out more? Unless perhaps someone here has experiences to share please?
Bob_bundus (Threads | Answers | This Thread)
Doug Blakburn's Soundstage.com review of the Belles Hot Rod 150A speaks about your exact problem. He used the Cromolin VC Damping material. Soundstage.com also has a review of the Cromolin material. It may be worth a look.
Shelton (Threads | Answers | This Thread)