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 !,,,,
