Great Thread... Absorbing it in with intense Vibration..Some really good info here.
Vibration Isolation for equipment using granite?
I recently visited a high-end audio salon and in the course of discussions with the owner, we discussed the large number of black granite 18x18" blocks he had against the wall. He said that he dealt with a granite retailer to make them from scrap granite pieces from kitchen installations, etc. He said that all equipment (amps, pre-amps, cd platers, DACs, streamers, turntables, etc.) all seemed to benefit from having them underfoot, even on quality equipment racks. It made me wonder if this was true or snake oil? I have my equipment (except power amp) on a Standesign equipment rack with each MDF shelf resting on small aluminum cones that "isolate" it from the steel frame. Question is, does this just add mass which would or wouldn't dissipate the vibration energy or does it work (maybe on another principal). And would sandstone or marble drink coasters, especially with cork soles) work better? Has anyone tried ay of this? Thanks in advance.
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I vastly prefer quartz countertop to granite, as being a mix of quartz and acrylic resin it has a much lower Q-factor than granite and greater density than wood - an 18X24 3cm slab clocks in at about 75lbs. Chosen from a local countertop fabricator boneyard, it was about $15 ft2 so $45 plus another $200 for finishing the edges. . Using 2" 70 Durometer Sorbothane feet from Amazon ($22.95 for 4) underneath, my 50+ lb VPI Prime Scout has no acoustic feedback issues. And since I didn't have footfall issues to begin with, I can't comment on those, other than to quote Newton's 2nd Law, F=ma or F/m=a. As mass increases, it takes more force to accelerate it. My rig is at 125Lbs and counting, so it takes a lot or force to excite it, and thats after the sorbothane has damped it. |
Granite used solely as a Sub Plinth will impact on the perception of the End Sound, but as has been mentioned not to all who have used it liking. My experiences of using Granite, is that I have come to prefer it over other Stone as a Sub Plinth, it has been compared to Marble and Concrete. Where it works best, is when used in a Sub Support configuration as a Tier in a assembly. I usually find Three Tiers with a selection of separator types works very well, and can be produced quite cheap, where the structure offers good impressions, which in my environment can impress similar to much more expensive sub support and footers. If you really want to get the Best from a Single Tier Sub Plinth the material known widely as a Resin Impregnated Densified Wood, will be worthwhile investigating, as a material it is about the best there is. |
@billstevenson read your response with a smile on my face. You are, of course, totally correct, but let me say it like it is: BS on top of more BS. |
@assetmgrsc Ah spoken like a true science denier. |
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