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I didn't read the entire thread so just jumping here. Hope it hasn't been covered.
Townshend's idea is a bit different than other people. They contend the speaker sends out bass notes, which come back to a speaker via the floor causing movement. Enough movement to equal the movement of tweeters which can smear or blur sound. So decoupling is to prevent this from occurring. They have this video to show what they have in mind. Also in some cases vibration from other sources can interfere with the speaker providing sound cleanly. My question would be if the amount of movement is enough to really make an audible difference.
There once were a couple in my opinion more effective videos showing the effect, but I can no longer find those. Their idea is rather like a TT suspension. Decouple by having a low resonant frequency of compliance and therefore block transmission of vibration to the speaker.
Certainly one can find information that ball and cup isolators can be effective in isolating a speaker from horizontal movement from the floor it sits upon. Is this enough to matter? Since we have some people who professionally work with vibration maybe they could comment effectively.
Also there have been people all along who claim suspending speakers by thin wire or string makes for better sound. That has not caught on which I think it never will for obvious reasons.
EDIT to ADD: I see Nightlord has already been speaking about some of the similar ideas. Essentially a damped low resonance spring under speakers. Some early footers were basically springs wrapped in rubber to damp the movement. Also some had the inside sealed so a small air leak could tune the damping somewhat.
Townshend's idea is a bit different than other people. They contend the speaker sends out bass notes, which come back to a speaker via the floor causing movement. Enough movement to equal the movement of tweeters which can smear or blur sound. So decoupling is to prevent this from occurring. They have this video to show what they have in mind. Also in some cases vibration from other sources can interfere with the speaker providing sound cleanly. My question would be if the amount of movement is enough to really make an audible difference.
There once were a couple in my opinion more effective videos showing the effect, but I can no longer find those. Their idea is rather like a TT suspension. Decouple by having a low resonant frequency of compliance and therefore block transmission of vibration to the speaker.
Certainly one can find information that ball and cup isolators can be effective in isolating a speaker from horizontal movement from the floor it sits upon. Is this enough to matter? Since we have some people who professionally work with vibration maybe they could comment effectively.
Also there have been people all along who claim suspending speakers by thin wire or string makes for better sound. That has not caught on which I think it never will for obvious reasons.
EDIT to ADD: I see Nightlord has already been speaking about some of the similar ideas. Essentially a damped low resonance spring under speakers. Some early footers were basically springs wrapped in rubber to damp the movement. Also some had the inside sealed so a small air leak could tune the damping somewhat.
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