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The Sony PS-X5, PS-X6 and PS-X7 all have the same footers, and they are very effective. Once in awhile, a set will be on eBay, if your looking.Wayner
High compliance systems inherently suffer less from these types of issues.Of course the downside is that high compliance prefers low mass arm - and additional damping solutions on the arm add mass.... so the high compliance solution often involves an arm with less damping material on it. Compromise compromise compromise....
Maybe I shouldn't rag about Mapleshade. When you consider the R&D and all the hard work that went into the development of these couplers I get a little peeved with some of the seemingly outrageous prices charged to audiophiles. On the other hand with charge card expenses and returns, they have to have some incentive to offer it. I'm surprised Herbies doesn't have them. We have 2 testimonials about the possible benefits and it might be worth checking out. This thread has only been going a few days. I'm sure not everyone is interested in all these articles. But for those into DIY tables or arms, there's design considerations here that can point you in the right direction. I haven't seen expert info like this offered elsewhere. I've seen some cool looking DIY tables. Most look like they'd be inferior sonically to commercial offerings even if they look beautiful. In the Stereophile interview he talked about the use of a counter pulley located on the opposite side of the motor pulley with a belt drive. This is unique and worth considering IMO. The only thing remotely like this is the VPI Classic locating the pulley at 7:00, opposite the arm pivots, like a Pink Triangle. My plan for using a Teres outer rim drive will locate the wheel like this. This addresses vibrations effecting the plane of the cart as it tracks the arc, but falls short of applying equal pressure on either side of the platter. I don't think you could do both and locate a counter pulley near the arm. There's no possibility of a counter pulley with a rim drive anyway, but it's something to consider with a belt drive.Some of the subject touched on, are tonearm/headshell vibrations, counterweight coupling, cart vibration dissipation, arm mass/inertia - vertical vs horizontal, platter/bearing design, platter construction, suspension considerations and the use of a counter pulley. Any comments or ideas are welcome. Here's another link:http://www.tnt-audio.com/sorgenti/belladonna1_e.htmlneo
Another DIY experiment with damping cartridge vibrations that yielded positive results worth mentioning. I laid up carbon fiber matting with slow cure epoxy resin to make a sheet 3mm thick give or take a little. You start with as flat as surface as you can find, I used a machined steel table top. A sheet of polyethylene plastic sheet gets stretched and taped down over the flat surface. The carbon fiber and epoxy gets laid down over the polyethylene. Use slow cure resin so air bubbles can dissipate. Stretch another sheet of plastic over an appropriately sized sheet of smooth Formica, granite, composite stone, etc. Use spacers of some sort on the corners of the overlayment board to control the thickness of the carbon fiber sheet. Lay the overlayment sheet on the wet epoxy and carbon fiber mat, wait 24 hours, and you'll have a beautiful bargain priced vibration damping sheet to use for DIY projects. I cut the material to use between headshells and cartridges. For my cartridges, I ended up preferring the SmallParts sheeting. Someone else with different kit might prefer the carbon fiber. You can buy carbon fiber and the resin online in various places as well as shops that supply the boat building trade. Just beware, carbon fiber is TOUGH as hell to cut, sand, and drill.
