turntable mats: should I use one?


I have a sota sapphire. I have never used a mat. Should I? If so, any recommendations?
elegal
Sorry to report that the outcome of the Resomat comparison was disappointing. 

Theoretically my thick, heavy composite, non-resonant platter was a match made in heaven and the ideal platform for the Resomat to show off its wares so there was a great deal of excitement and expectation on approach.
Although the signal was clean enough I could summarise the general character of the Resomat as lightweight and insubstantial. Sibilants were slightly exaggerated although not excessively so. (You could get used to it).
I couldn’t resist looking underneath to see how many contact points were supporting the LP and found that only the innermost 3 on the LP in question were actually working.
This may lend credence to Ynwoan’s alternate design which uses only those 3 points but lightly clamps the LP from above - meaning that the playing area is unsupported. That would probably help to control sibilance and add more meat to the bones?

The Resomat was claimed to create a wider soundstage but perversely it was actually the GS Ringmat that generated the sense of a wider soundstage allied to a great deal more presence and bandwidth on all instruments – even those “outside the stage”. Sibilance with the Ringmat was much better managed and balanced. Its resolving power and sense of realism on percussives etc is first class. Basically, you could be unaware of many of the sounds that the Resomat was trying to create simply because the frequency balance was off-par.
Consequently it was an easy win for the GS Ringmat. Bear in mind that the GS Ringmat, at £85, is 3X as expensive as the Resomat but nowhere near the $500 needed to secure a Zanden mat, so if the Ringmat is defined as a good buy then the Resomat is a positive bargain(!)

Needless to say there are plenty of Users who are more than happy with the Resomat (although it’s unlikely that many of them have tried the mat or the hybrid combination that I’m using) and I wish them all the best because the Resomat is still a good mat, simply not the mat for me.
Despite the failed comparison I will be retaining it. 
On a positive note I found the Resomat a better listen than the Achromat.
….and you’ll never catch Lyme disease from it….. ;)
Dear Moonglum, Unfortunate many or maybe most LPs are not perfectly flat.
Using Reso-Mat for a convex LP there are only the 3 inner points contacting record. The grooved area, actually the whole record is spinning in air.
The other side is concave and thus there are 6 outer points in contact. This case is sorted out with light clamping and thus all points are in contact.
Sonically both cases may very well benefit from light clamping. On the other hand too heavy clamping ruins everything in achieved sound improvement. I use clamp only for flattening concave LPs.
In my system Reso-Mat, and particularly tall Reso-Mat improves sound quality and quantity in all frequencies, and with all records. After 2 years I have not experienced sibilance nor other issues caused by Reso-Mat. I have one "top" MM that suffers from annoying sibilance, even with new stylus (a false sample or a false "god").
In my system lifting record off the platter seriously improves the sound. Music just flows nicely. For me there´s no turning back to conventionl mats.
I must point out that I still use the original dense and soft mat (GROOVE ISOLATOR) under Reso-Mat because it eliminates ringing of the metal platter.
Has anyone tried a cork mat? Theoretically, cork should be excellent as a material as it is a natural vibration control material. I imagine natural musician's cork 1/8" thickness would be the cat's pajamas.
Hi Harold,
There are qualities about the Resomat that I like. Sibilance is not what I'd describe as excessive, just a whisker more than I'm accustomed to. On the face of it both mats are unconventional being mostly suspended in air. It's obviously a synergy issue because many who use similar T/Ts - with the heavy mat as an underlay for platter damping - are reporting good success.

Kind regards,