I disagree. When you couple the speakers to the concrete floor using spikes, the energy has nowhere to go but back into the speaker cabinet. The Stillpoints design principle is to absorb and dissipate the energy. They worked very well under my Verity Parsifals on carpet on a concrete slab.
I agree with edorr. All of our experience testing on a variety of surfaces, including carpet on concrete, tells us the product isolates the component from the room as intended.
Will be interesting to follow this as others hopefully try Stillpoints in their own systems. I have been extremely impressed with them...'addictive' indeed. I kept the 3 for the sub and got one each for the Transport and Preamp...'done for now'. Specific notes on specific tracks which i knew were 'problem notes' have completely changed and fallen straight in line with the rest of the music like there was never any problem. No amount of tweaking has been able to do that before. Meanwhile on all material, lyrics are clearer and 3 out of 9 tracks, i have found little parts (to in a few cases whole sections of music) appeared easily and effortlessly which i did not know before. I gave a few examples earlier in this thread...i have since continued to discover more. Basically far better decay...loads of fun.
Will be interesting to follow this as others hopefully try Stillpoints in their own systems. I have been extremely impressed with them...'addictive' indeed. I kept the 3 for the sub and got one each for the Transport and Preamp...'done for now'. Specific notes on specific tracks which i knew were 'problem notes' have completely changed and fallen straight in line with the rest of the music like there was never any problem. No amount of tweaking has been able to do that before. Meanwhile on all material, lyrics are clearer and 3 out of 9 tracks, i have found little parts (to in a few cases whole sections of music) appeared easily and effortlessly which i did not know before. I gave a few examples earlier in this thread...i have since continued to discover more. Basically far better decay...loads of fun.
So, Lloyd, is that 8 Ultra 5's for the speakers, 3 more for the sub, but only ONE for the transport and ONE for the preamp? A total of 13?
How can Ultra 5s sitting on top of a sub make any difference? One end of them is unloaded and therefore how are they coupling to anything?
How can Ultra 5s sitting on top of a sub make any difference? One end of them is unloaded and therefore how are they coupling to anything?
Mep, I'm surprised no one has answered you yet~ I have the LP isolator, which is an adaptation of the Ultra 5. The short answer is, I think, twofold: first, mass, and second, the LP isolator (and the Ultra 5 as far as I know) have these isolated 'pads' that are connected to the decoupling system embedded into the devices. They function in some way to absorb and neutralize vibration. I'm sure someone else can provide a more scientific explanation, but that's the gist of it as far as I understand it.
Sounds about right to me (non techie)...the sub did not really achieve a demonstrable level of difference until i stuck 3 down. I suspect part of that is simply weight and vibration. Each Ultra V is quite heavy, and in addition to the 5 ceramic balls inside (similar concept to Finite Elemente cerapucs?) which apparently are the decoupling part inside...i think the weight alone also helps. Each Ultra 5 is comprised to two halves...one half sits ontop of the other but they are in contact with each other only via these 5 ceramic balls. It is like how the Metronome Kalista Ref sits on top of its acrylic base...via 4 steel ball bearings so you can actually push the entire transport, bang the table, etc because these ball bearings or whatever are taking certain kinds of vibration...the transport continues to play smoothly without skipping.
FWIW, the LP isolator works well on top of my transport...the Ultra 5 is better (and also heavier)...even though both have 5 of those ceramic balls inside. I imagine that the same applies to the sub...the weight is helping...but again, i needed 3 before feeling like the bass was sufficiently better. And it is much better....of the 6-10 tracks i found unlistenable due to nodes that keep vibrating in that one spot in my room...3 of them are now dramatically more tamed and most are now 'acceptable' though not great.
I still get the node but the air filling up with bass in that one spot now at least starts and stops on a dime...no more loong, sustained bass energy just filling up the room in that one spot. I can only think this is because the sub was continuing to vibrate and generate waves into the floor or whatever after the bass note...which componounded the problem of the node...so instead of individual bass notes, you got this loooong drawn out bass whoomp that would go on for several seconds if not the entire track which was intolerable. Now at least the bass whack occurs (not a clean one due to node but a single bass whack at least), and it now finishes well before the next bass whack so it feels like a proper beat even if not the cleanest one.
Lloyd, what you are suggesting makes sense. One of the biggest problems with subs, IMO, is that the cabinets that they are typically housed in are very prone to vibration. Unlike several speaker manufacturer's, most sub manufacturer's seem to place little care into the rigidity of the sub cabinet....an area where i would think would be most crucial. A while back, I did notice that Krell made a sub out of aluminium, which was extremely rigid....unfortunately, the cost was also very high. BUT, it would seem that the vast majority of subs on the market today are not constructed to that degree. Damping the cabinet walls is IMO a very good idea....leading to far less smearing. BTW, the old VPI brick of yore was pretty good at this type of damping, I would think a similar result could be gotten with a few of these on a sub cabinet.
Mep, I'm surprised no one has answered you yet~ I have the LP isolator, which is an adaptation of the Ultra 5. The short answer is, I think, twofold: first, mass, and second, the LP isolator (and the Ultra 5 as far as I know) have these isolated 'pads' that are connected to the decoupling system embedded into the devices. They function in some way to absorb and neutralize vibration. I'm sure someone else can provide a more scientific explanation, but that's the gist of it as far as I understand it.
Thanks, Davey. Good to know. All i know is...they work! Good to understand a bit more behind it as to why. Have heard good things about VPI bricks.
If I wanted to "drain" acoustic energy out of a cabinet, I would take a bunch of sorbotane pucks and put them on top of the sub and put a steel plate on top.
The only thing that Davey postulated was that adding weight on top of a sub cabinet was good for dampening. VPI made "Magic Bricks" which used to claim some special properties for dissipating magnetic energy when placed on power and output transformers of tube amps. Stillpoints were designed to couple two surfaces together. If you don't use them as a coupler, I don't see how in the world they would have any more benefit sitting on top of a sub cabinet than some small dumbbell plates would. Maybe I'm missing something here because I don't get it.
The LP isolator is designed differently than the Ultra 5s. Having expensive couplers that were designed to be loaded at both ends unloaded at one end and obtaining magic is truly magic.
Edorr,
Perhaps you would risk creating a resonating system using the elasticity of sorbothane and the mass of steel. Would it sound good?All these systems must be adequately dimensioned or the added material risks doing more wrong than good. Acoustic impedance and mechanical energy dissipation are tricky subjects and just because a viscoelastic material can absorb impacts very efficiently does not make it a good damping material for audio. I remember reading a study of Dynaudio for their double box speakers about damping materials and sorbothane did not score very high.
Long ago Audioquest sold adhesive sorbothane sheets. I bought a few and damped an old Thorens TD125 turntable with them - as many sheets as I could glue on it. No more resonances, it sounded really dead when knocked. But after the mod the turntable sounded miserable.Later I learned in a magazine that the turntable could be improved using some damping materials, but sorbothane was not adequate and damping should only be applied selectively in some parts of it.
I don't disagree, and I was extrapolating from what I do know- that the LP Isolator is adapted from the Ultra 5, and i am aware that the manufacturer does encourage the use of the LP Isolator as a mass damping device to be used on top of component chassis, etc. I also assume that the Ultra 5 is heavier than the LP Isolator. Me, I'm rather conventional- I'm using the LP Isolator on my turntable, as a spindle weight....The Ultra 5s are designed to couple something like a speaker to a floor or a component to a shelf. In other words, it's loaded on both sides. When you take 3 of the Ultra 5s and just place them on top of a sub and one end of each Ultra 5 is unloaded, they can't work as they were designed to. All you have down now is set some very expense weight on top of your sub that is now not working as it was designed to. It doesn't make sense to me to take a very expensive device like the Ultra 5 that was designed to couple two surfaces together and leave one end in the breeze and think you are using these devices correctly.
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