Townshend Springs under Speakers

@tomic601 - this definition? A value far from most others in a set of data.

If the floor is wobbly, springs can work, if the speaker is on solid ground, 3 spikes is preferred.

If one would consider a solid reinforced concrete floor to be "not wobbly" it has been my personal experience that sprung isolation works significantly better than on a so called "wobbly floor".

The main reason I concluded was that instead of the floor being excited by the energies created in a loudspeaker enclosure deforming, that the higher percentage of energies are deforming the springs. The floor no matter what it is, has a resonant frequency, however the more it can withstand deformation the higher the percentage the spring will be required to deform in order to effectively hold the loudspeaker as motionless as possible.

The concept that energy is stored in the springs used to uphold a loudspeaker is not entirely accurate, it deforms and returns to status quo with the load, and will move above and below the status quo holding the mass placed upon it. The ideal is to have an engineered spring loading for the mass it’s to isolate a broad range of frequencies, all within the audible range.

Such an engineering precedence is used in correctly assembling cars with different rated springs, depending on the result desired. One spring does not suit all applications, and so, it is the same with different loudspeakers.
I will suggest that the more rigid the car structure, the body, the more effective the suspension system can be engineered to support it. The results are much more predictable.

Last time I checked, I was not driving my speakers down a bumpy road

you have it upside down, your loudspeakers ARE the bumpy road!

Are we to believe speakers ring in the sub-hertz*** regions and this noise actually transcends into audible noise that the human ear easily detects?

Great question.
More to the point though in the application of loudspeakers, is that fact they reproduce the entire audible frequency range, and with that energise the enclosures.

If one where to consider the speaker enclosure as a very rigid balloon, that when the bass/mid-bass driver moves in and out will shake, pressurise and depressurise, especially when driven hard.

The bracing effectively creates smaller surface areas with distinct sizes of wall material, depending on the engineering qualities of the enclosure. This creates smaller nodes where frequencies can excite the enclosure walls.
An easy way to test this out on your own speakers is to play a frequency sweep of white noise, at levels you listen at in your own system. Assuming the track has the same amplitude throughout, you will hear the accumulated sound of the cabinet and the signal the driver is reproducing.

I heard a single Focal BE 1038 subjected to such a sweep and heard multiple large frequency breakouts from the cabinets, clearly colouring the voicing of the speakers. This largely evidenced what we heard when listening to a pair that had been traded in.

https://www.youtube.com/watch?v=oSB-nmlbkdA
Nikola Tesla vs Mythbusters - this has some good information regarding this phenomenon.

So the bracing inside a speakers enclosure will create different frequency nodes that can be excited depending on the engineering controls of energies that are introduced to by the drivers, throughout the audible frequency range.

Engineering controls of vibrations can vary in effectiveness considerably, and will have an impact on the overall voicing the loudspeaker** delivers.

** distinctions are important when explaining anything, I often use the term drivers instead of speakers, because often people use the term speaker/s for that which I mostly use loudspeaker.**

*** Sub-hertz, are you referring to a frequency cycle under once cycle per second?

I guess I should see what’s happening homeward as you say, but my brother who I talk with hasn’t expressed much concern. Americans ask me about the whole Covid lock down in Australia, my brother gets on with life, not worried by it. He's safely up in Queensland.

Mind you, it should be understood the total deaths attributed to Sars Cov 2 in Australia is 1039 https://covidlive.com.au/report/deaths

Like any other disease, get on with the treatment plan. We’re not back where we were a year ago, doctors have learnt a lot by actually studying this little monster.

@tobes
thanks for sharing your system on your system page. Where'd you get those skyline diffusers on your ceiling please?

thanks jayctoy and tobes.

I was a little surprised that MC publicly announced my intention to build speakers in the US, in such a manner, a model as yet not designed.

However it is true, that is my intention for the future.
I had never told MC that he was not to mention it, there was no pledge of secrecy, I did not consider a conflict of interest though. As the speakers I currently own, that I built myself, are made of materials that are no longer available, it didn't occur to me to be an issue??

New Zealand company Laminex no longer produces HD3, which is 1.6 times denser than HDF board. Many already know I am trying to find a replacement material much like Panzerholz, and have had help by some Agon members in tracking down good materials for a highly inert enclosure structure.

@three_easy_payments - I cannot deny your sentiments, however, as those particular products have largely provided such good results (not for everyone) for most. I would hope that flaming a good product from a good manufacturer for personal clashes could be shelved?

Despite personal grievances some may have with MC, if indeed there is merit in the talk of MC being a dealer for them? I would hope a quality product should be allowed to flourish that provides benefits to other members of this forum.

Looking forward to seeing the "full disclosure" statement at the end of each and every post from now on. - twoleftears

Oh man, sarcasm galore. ROFL

Going back a bit MC was always touting the benefits of SR products to the skies for anyone within ear shot. Right around the time he started touting Townsend products I remember a throw away line he had about Ted Denny being an enthusiastic DIYer and not in the same league as Townsend. I could be wrong (a quick search turned up nothing) but it really struck me at the time that he'd say something like that, which made me sit up and take notice. - nonoise

https://forum.audiogon.com/discussions/extra-extra-millercarbon-proven-wrong-read-all-about-it-extra...

@nonoise this quote?

...Not like I shouldn’t have known better. I Met both Caelin Gabriel and Ted Denney around 1992, back when they were not that far from being DIY’ers themselves. So it is not so much that it can’t be done, as it is just astronomically unlikely... - millercarbon

there’s a new DIYer in town.- nonoise

Is that millercarbon?

I say best wishes to you, and again I just believe people want open disclosure on products you frequently tout/promote ’if’ there’s a business or financial connection. I do not believe that is an unfair standard or expectation.
Charles

Obviously, that's reasonable Charles.