Superb info Anup. Pete, interesting link. I did not know those folks. I am a confirmed believer in Mapleshade racks and Sfillpoints feet. Now, with Anup’s input, I plan to do some testing. My Mapleshade rack is all for my headphones, and so I will be surprised if I find a “whole lotta shaking’ going on.” But it will be interesting to see what my Vivaldi, Merrill, SRS, and Legacy components might be picking up in the speaker system.
Interesting to note that one of the Minus -K isolation products comes supplied with the current contender for the “best turntable in the world” , the SAT XD-1 ( fully loaded €238,000 to you, Sir) and is also built into the less costly £50K Dohmann Helix 2 'table ( to be fair when combined with arm and the forthcoming vacuum hold down it is going to be more expensive).
Another isolation system that actually works is Vibraplane :
https://www.kineticsystems.com/the-ksi-solution/
Again I am trying to indicate the level of engineering required to actually isolate equipment.
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Why you need a rack?
https://bassocontinuo.biz/why-you-need-a-rack/
Ultra Feet - Enhanced Isolation system
The first fully tested isolation system (?)
https://bassocontinuo.biz/ultra-feet/
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Thanks Anup. Very interesting recommendation which I downloaded. Are you using any of the paid for options? I ask as I note that the graph that you show as a screenshot is working to 4 decimal places. Mine seems to be fixed at 5 decimal places which results in so much measured seismic activity that it is difficult to make much sense of it. Any advice would be gratefully received.
Best Wishes
Pete
Pete; just the App without any additional in-App purchase( as yet).
What you see in my screen shot is the defaults; 1024 FFT window size, rolling 10sec data collection at 100Hz, and response in Hz across a linear scale to 50Hz.
Make sure you’ve selected the Fixed scale instead of floating [via the graph button just above the trash-can icon], that might by why you’re seeing additional decimal places. 
Thanks Anup, yes I think it was auto ranging. I sort of repeated your screenshot test by placing my i-pad on top of my Rossini Transport. I didn’t get the same display as you - no colour etc. but that may be due to different versions of the app. My display looked superficially a fair bit noisier than your result but the vertical scaling was not the same ( most of these setting adjustments are not available from the free version). However a big surprise was no visible change from a “silent” room to when music was being played, (network , not using the transport). Hmm 
.
https://bassocontinuo.biz/ultra-feet/
These look interesting, I also downloaded that app but don’t really know what i’m doing. Will have to investigate both further.
That’s OK. Nor do they.
Do read the technical report which really concludes with nothing of any significance:
" VicoterResults demonstrate that, when loaded in their respective design ranges, each damperoffers the best performances respect to the other ones."
.
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Isn’t that good!? 
It would suggest that your system might be well isolated! To verify that the App is functioning as it should, just lightly tap with your finger anywhere on the chassis of whatever you’re measuring, it should show up on the graph!
The App was apparently original[ly] designed to measure motor/fan speeds.
An interesting off-shoot from this is that, it looks like my Vivaldi Transport spins SACD discs at about 2100 RPM (@ track 1, and gradually down-speeds slightly), and about 1800 RPM for Redbook discs. While my Melco N1A chassis (with upgraded 7200RPM SSHD Drives) purrs gently at 36Hz (likely an effect of the rubber grommet decoupling of the drives from the chassis).
I should state that none of this appears to have any measurable effect on sonics though 
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I suspect that appropriate quantities of Pinot Noir or single malt or similar will have far greater effect. 
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Without a doubt! And it happens weekly!! 
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Take a look at Black Ravioli. I’m using it on all my kit with excellent results.
Hi Spursfan, thanks for the suggestion. Which ones do you use?
Leo, I’m using three things.
I have lots of the Big Pads, which I place under all my kit. These are very good.
I also have some “mats”, which I notice are no longer available on their website. I know they had some production issues - they are only a small business - so this is perhaps the reason for it. It could be worth giving them a call to find out if they have any left in stock.
And, finally, I have a bespoke piece of kit which goes under my LP12. The improvement in sound this gave me was sensational. It’s probably been the single most cost-effective upgrade I’ve ever made to the LP12.
All in all, what Black Ravioli makes really does improve the sound. If you try a few Big Pads, I feel sure you will end up buying more.
Happy to exchange more info with you if you wish.
Good luck
Simon
Hello everyone. Does anybody have experience with these dampers on their dCS devices? Thanks. Franco
htthttps://artesaniaaudio.com/producto/accesories/
Franco I think that @kaitainen uses them, Here is a link to his last post about them. Maybe you could PM him?
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Thanks a lot Peter!
So yesterday I purchased this 2.5 kg anti-vibration steel damper (Artesania) and placed it on the top of my tube amp. After a few hours of listening, I suddenly heard a hiss on the right channel twitter of the speaker and after a while the amp went out, blowing the fuse. This happened three times. After the second time, I noticed that one of the speaker cables’ spades was broken and replaced the speaker cables with others, but it happened again so I kind of excluded that as a reason of the issue. I’ve now moved interconnect cables into a different preamp input to check whether that could be the cause. Can anyone guess what happened? Many thanks. Franco
Yes, It’s a tube amp and you have been blocking the ventilation by placing a 2.5kg steel damper on top. So the amp is overheating and the fuse is blowing.
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Ansuz Acoustics from Denmark manufacture resonance control devices. Lars Christensen left Nordost the cable manufacturer and later founded Ansuz with Michael Børresen. Aavik electronics and Børresen speakers are sister brands. I’m new here and am excited to contribute to this beautiful community as a long time audiophile and music lover (pure consumer not affiliated with anyone). I first tried and kept the Ansuz feet a couple of years ago in my former Naim setup and was very pleased with the result - after going from four to three feet placed directly between case and rack (not Fraim). And I prefer to have one of the feet in the front and two in the back. Maybe because in the back there are the cables which mechanically ‘pull’ on the device or introduce vibrations.
Right now I am using their Titanium Rack plus three Darkz feet directly underneath each individual box. The Ansuz power distributor got its own Titanium rack shelf. The cables on the floor are supported by their cable lifters and I take care that all the individual cables behind the rack have some air around them. In total this is a very large investment into resonance control. One rack shelf with the extra feet in my setup buys you roughly a Bartók. This is purely to say that I was willing to part with significant hard earned funds for the result. Ah, and by the way, the columns are made from titanium. Beautiful material…
What the resonance control results in - it realises untapped potential in the boxes. And depending on what the mechanical setup is before an upgrade, that revealed potential can be quite stunning. At first, I had the feet / pucks the wrong way around in the titanium rack. They look very similar on both sides and have no obvious top or bottom. Just correcting that blunder made a difference I would not want to miss. I love to listen to music for hours on end. So the effect is not an “in your face, first five minutes excitement”, which wears off and ultimately gets on your nerves. It reveals more of the music - any music. It helps in opening up the music, so the consciousness can perceive the intent of the music more directly. Without thinking in between. Like ‘this is epic’ or ‘this feels abrasive’.
I am new here and it will take time for the community to find out whether my ears are any good. And I don’t know how Ansuz’ resonance control compares to - for example - Stillpoints. But I know I’m not the only one who has used feet costing as much as a box itself and are happy with their result. In my case that parity applies to a Stax and a Burson headphone amp. Apparently the mechanical vibration inside the boxes - even extremely minute vibration - makes a big difference. Probably hifi boxes are at a level of maturity, where these small mechanical differences matter significantly.
As for trying at home, I might get a sample box from Ansuz (dealer) and start by putting the best ones under the source and under the power distributor and listen. If there are a lot of existing pucks (Stillpoints for example) in the system, it might be better for evaluating the changes in sound by taking them out first.
As this might lead to a discussion - can’t be audible, hard to measure, no proper reasoning for causes provided - the following two cents worth. A complicated system like a hifi system with all the systems adjacent has known unknowns. One of the recurring known unknowns in hifi is the answer to the question ‘why is it audible for a group of people?’. Human mind and its consciousnesses are little understood in the West. Maybe an analogy is interesting. Doing scans of brains does not tell us the quality of a feeling. And it is reasonable to expect that scans of matter will never yield that result. Mind is other than body. It is dependent on body, but other. And in our everyday consciousness while listening to music or audio there are many things going on in the mind beyond the sound. Everyday mind consciousness forms an internal ‘image’ of what the ear consciousness presents. How that internal mind ‘image’ comes to be is very different between people. It can be changed over time through the practice of meditation. Another analogy - someone with little listening experience might fall for a placebo tweak or he / she might not be able to discern the difference at all. Or yet another analogy - mind consciousness could bring thoughts of associations to the sound to the fore. Those could be ‘like’ / ‘don’t like’ or maybe ‘ahh, I should listen to that band next’. Those mind ‘images’ arise and cease. They are called mental events. Someone who is trained in listening for the sound signature of music can discern things that can not be predicted within the boundaries of the complicated system itself that is called hifi.
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