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In Reply to: SorboGel Mat - Directions from AQ posted by Dick Laurent on December 15, 2005 at 12:40:24:
Joe I have an AQ Sorbothane mat on my SOTA Sapphire and it works great with the reflex clamp, generally I much prefer Cork Spotmats
on my Thorens.But with DD's and idlers as well the heavier Rubber or Sorbothane mats seem to rule the roost for whatever reason(s) ? and as you've doubtless gathered by now DD's are to one degree or another sneered
at with disdain (sort of a fart in Church thing ;-)among'st some of the elitist higher end belt drive types, and the Sorbothane mat is along the same lines for many of the same reasons.
Follow Ups:
I've been wanting to try a cork mat,but I can't find a place online to order.
"There's something magical about an ELF"
The TAD (The Analog Department) site sells or sold the Spot mat Steve developed, I don't know if they still sell them, but the
design is very easy to DIY and there are all kinds of photo's and
a few good descriptions, I believe the recently foam Spotmats are considered even better.Auto supply outfits are an excellent source of Cork sheets and various cork composition gasket materials.
Regards FredJ
Thank's Fred!!!That was a very useful link my friend.
"There's something magical about an ELF"
Not at all. You need to look at why you are getting the sneers, not simply from whom. The Sorbothane works fine for noisier tables as it absorbs and actually dissipates (eliminates or attenutates depending upon how you want to look at it and how much noise is present) noise from the platter. The platter in direct drive and rim drive designs suffers from more motor noise than belt drive designs, all else being equal. That is why it is better suited for use on these tables.
In a very low noise, belt drive design, the noise is not from the motor but from the vinyl itself and friction with the stylus. This noise can be absorbed along with some of the pleasant response of the "vinyl sound" by a Sorbothane mat or it can be dissipated through more rigid materials without the same sonic attenuation. I think the issue here is energy storage and release. The Sorbothane stores the energy longer and some call the warmer, smoother sound resulting to be "smeared". Cork and constrained layer dampening when used with a harder initial surface such as acrylic or aluminum does not store the energy as long and it is transfered more ditrectly to other structures if this system is in place. That probably explains why you prefer the Sorbothane on the rim drive unit and the cork spot mat on the belt drive unit. Maybe you just weren't "holding yer mouth right"
Sneers,
Bill
Henry
~
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