The combination of roller bearings and either metal or air springs (which decouple in the vertical plane, providing isolation) provide isolation in all three axis down to perhaps 3Hz, about as good as you can do outside of the $2000-$3000 Newport and MinusK tables, and the Townshend Seismic Pods at about half that. I’ll let Geoff speak in behalf of his own springs!Based on what measurements? Geoff does not have any actual data (or customer feedback). Do you?
Do equipment stands have an impact on electronics?
Mechanical grounding or isolation from vibration has been a hot topic as of late. Many know from experience that footers, stands and other vibration technologies impact things that vibrate a lot like speakers, subs or even listening rooms (my recent experience with an "Energy room"). The question is does it have merit when it comes to electronics and if so why? Are there plausible explanations for their effect on electronics or suggested measurement paradigms to document such an effect?
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"The combination of roller bearings and either metal or air springs (which decouple in the vertical plane, providing isolation) provide isolation in all three axis down to perhaps 3Hz, about as good as you can do outside of the $2000-$3000 Newport and MinusK tables, and the Townshend Seismic Pods at about half that. I’ll let Geoff speak in behalf of his own springs!" to which agear replied, "Based on what measurements? Geoff does not have any actual data (or customer feedback). Do you?" Geez, agear, there you go again! The same old demands for measurements. Knock yourself out. By the way, I have tons of feedback right here on Audiogon, not to mention my own website. Duh! http://www.resfreq.com/images/BODY-WAVE-TRANSMISSION-REDUCTION-with-Appendices.pdf Link to customer comments on my website, http://machinadynamica.com/machina11.htm Y'all have a nice day Geoff Kait Machina Dynamica Advanced Audio Concepts |
agear, for anyone desiring measured proof of the effectiveness of the Townshend Audio Seismic Isolator, let me once again state that Max Townshend has a video on You Tube in which he explains the theory and design of the product, and demonstrates its isolation capabilities and effectiveness in a couple of ways. One demonstration is of a speaker with its enclosure having a surface mounted microphone (there is a name for them, but I can’t recall it. It’s the type John Atkinson uses to measure cabinet resonances in the Stereophile speaker reviews) attached to it, the output of the mic displayed on an oscilloscope. Max stomps on the ground near the speaker, both with and without the Seismic Platform installed under its enclosure, the oscilloscope displaying the cabinet resonances produced in response to the foot stomping both ways. He also raps on the speaker cabinet with his knuckles, again both with and without the Platform under the speaker, the mic output again displayed on the oscilloscope. Max does another demonstration proving the effectiveness of his products in regard to minimizing (or eliminating?) internally generated resonances. Very interesting and informative, to me anyway. There is an Audiogon member who lives not far from me, an owner of a very nice system (the member has posted it in the Audiogon Virtual System section, but I don’t feel I should assume he doesn’t mind me identifying him) with loudspeakers under which he has installed the Townshend Seismic Platform. He found it to provide a very noticeable improvement to the sound of his speakers, and has extended to me the offer of an invitation to come over and take a listen, which I intend to do very soon. I will then consider whether or not to acquire a set of the Townshend Seismic Pods for my own speakers (as well as perhaps for my turntable and CD player). |
Measuring the performance of any spring based iso devices is not rocket science folks. All you need is a second hand on a watch. Then manually set the iso device into motion. And time the number of cycles per second and you have the resonant frequency Fr in cycles per second, or Hz. Then the isolation effectiveness of the device for any structureborne frequency is only a calculation away. |
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