Townshend Springs under Speakers

Hi Charles,
I don't think that I knew that you were using the Starsound platforms beneath your Coincidents. How long has it been? 

Doppler….it’s simple…

 if F=MA explained the whole universe, what a boring place it would be. Somebody skipped a few lessons…

the 7 weighs less than the 225# 5a, yet has better cabinet performance…because somebody didn’t just sit on laurels… It incorporates advances in science and materials. I can hear it having owned both the 5a and the 7.  

Also the main but not sole source of vibration energy in the 5a and first 2 model 7’s is the 12” dual voice coil push pull driver….wait for it… aligned vertically…..Let me know when the 1812 cannon shot levitates that 225# 5a, or pins it to the floor. Tell me where the lever is again ? Like i said before, the Kento and new 7 extreme use force cancellation drivers ….mounted very low in the cabinet…

All Vandy speakers come w 3 spike attachment points including String’s 5a, i assume he is using them.

Bedrock came about in a creative collaboration with Helmut Brinkmann ( ya that guy ) at the Munich show. 

All this isn't new…good speaker designers from a host of cutting edge firms which come to mind are trying to build lower resonant cabinets that don’t reflect energy back into the drivers…

and some like Harbeth build superb sounding kit despite it…

Finally, measure and listen… tools for measuring the cabinet radiated and stored energy release ( think that thru )  are widely available and frankly inexpensive, ditto access to a laser scanner to see what a cone or panel is doing relative to the input signal….

Excuse me while i go listen to my Quads….the BBC  has a lecture on …..quantum physics…I am wondering why a genius like Peter Walker would emulate a point source on a planer driver….it probably has something to do with …..F

For the DIY crowd, Bedrock could be somewhat duplicated w Granite, some thoughtful milling and Green Glue or another constrained layer elastomer of your choice….

carry on, enjoy your music, springs, etc !,,,,

@roxy54, 
I've had the Star Sound  Apprentice platforms beneath the speakers and every audio component for the last 6 or 7 years. 
Charles 

i don’t think you can generalize what is an ideal speaker-floor interface method across all speaker types and floor types; that is a mistake.

how my 750 pound each (x4), twin tower, Evolution Acoustic MM7’s work on 6 inches of concrete is different than a speaker half or less weight on a suspended wood floor. then take that smaller, lighter, speaker and add multiple subwoofers to it.

that smaller speaker on the trampoline of a suspended wood floor being also energized by a bunch of subs will likely get a net benefit from the extreme decoupling of the Townshend springs. then consider the cabinet build quality at particular price points and that is another factor favoring extreme decoupling.

my MM7’s are over-built with 2000 layers of baltic birch and pressed together by a 6 ton press. you have 750 pounds of mass and a concrete floor. i still use Wave Kinetic 2NS speaker decoupling footers for a small degree of decoupling which does eliminate smear.

http://www.chambersaudio.com/product/wave-kinetics-2ns-loudspeaker-interface-system/?doing_wp_cron=1...

horses for courses.

passive resonance treatments are very much a matter of context. one size does not fit all.

btw; my speakers are voiced using the 2NS footers on a concrete floor. i have visited my speaker builder multiple times. he set up my speakers in my room.

Charles,
That’s great. They’re really amazing. I don’t know if you’re aware of these, but a couple of years ago, Robert suggested that I night add the APCD4-Inverts between the upward facing cones and the speaker bottoms. I got them, and it not only improves the effect, but it prevents further damage to the speaker bottoms and makes small placement adjustments so easy.
John
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