In Reply to: Why would it be affected, does that really seem reasonable to you? posted by Sordidman on May 3, 2012 at 08:49:03:
"Do you think that it's possible that the vibrations of the speakers could transfer along the wood flooring? Have you heard, or read about resonant frequency?"
Possible? Why it's a certainty! The issue to me is that this is just part of the normal environment and the amplifier should have sufficient immunity to not be bothered by it.
"I don't understand what you mean by hypothetical. I am not alone in my assessment of LAMM gear."
Oh, sorry. I didn't realize you were referring to a specific amplifier I thought you were using $80,000 as a price point. I wasn't familiar with LAMM so looked them up. I don't know which model you are thinking of since they don't post MSRP's but I looked at both ends and liked the looks and measurements of the hybrids. If there is significant microphony the tube is of course the first suspect since they are inclined to be rattly unless they use a frame grid. But it looks like a pretty solid design to me. Of course it's really impossible to know without testing the critters but I really doubt that you will hear footsteps through them.
"Don't you think that more people would be interested in your experience, then you're unqualified, bitter, and wrong-headed speculations?"
I offered no speculations, bitter or otherwise, merely outlined what I consider a reasonable level of performance. I'm not sure that you understand but it's clear that you don't agree, no problem, as they say nowadays...
Experience-wise in a half-century I don't recall ever having an overt problem with microphony in SS home audio gear nor subtle problems that would show up as sensitivity to placement. Outside of turntables of course... Even in the tube era it was uncommon and usually just a bad tube. It might have gotten worse in the last couple decades. By and large transistors and IC's fare a lot better with shock and Vib than tubes, but some of the newish SMT packages have gotten so tiny and weak that they expose the die to flexure and strain that just wasn't previously an issue. I've had to relocate the parts in a couple cases.
As far as shock and Vib in general goes, I've done my share of electronic stuff for rockets, airplanes, log trucks, forklifts, even artillery shells so home audio seems pretty tame somehow. External shock mounting should not be necessary and if it helps fixing the root cause will probably do even more. BUT, I do realize that's not an option for the end-user and "isolation" platforms are.
Good listening, Rick
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Follow Ups
- RE: Why would it be affected, does that really seem reasonable to you? - rick_m 21:08:09 05/03/12 (2)
- Could be the signal path - Sordidman 09:12:08 05/04/12 (1)
- RE: Could be the signal path - rick_m 11:28:19 05/04/12 (0)