Townshend Springs under Speakers

said this many times before.

If you have a time aligned speaker and the cabinet is allowed to move then the cabinet motion will be at 1 or more frequencies greater than the motion of the tweeter. As that happens the speaker will never be in true and proper alignment...

In the 80s Polk Audio had a Time Aligned speaker and demonstrated with a Laser Interferometer that when this speaker was unsecured the tweeter was never in alignment with the woofer. I cannot find the printed ad..

Tom

https://www.designisthis.com/blog/images/uploads/2012/02/Origin-live-astute-hanging-loudspeakers.jpg

tweak……and so few are time aligned and phase correct…so springs “ work “ for them. The narrow focus of tge tgread should have applied… alas..

Mike - i would also trade the high end gear and sonics to relive my young adulthood… 

tomic601..

Springs and floppy things allow the cabinet to retain information and resonance far to long. The cabinet is a passive radiator that transmits sound into the air along with the intended signal. The cabinet motion also becomes a part of the voice coil motion. The voice coil drives the cone but also has to overcome the force of the cabinet in motion even more so when suspended on springs or floppy thing mounted.  More to follow.  Tom

If it was cabinet resonance, then a board green glued to the bottom of the case might help.
I would like to see some evidence that they reduce HD.
Putting the speak on a plate of steel or rock would seem to make more sense to me.