Platter mat ?


I am using a VPI hw19jr TT. I have been using it for about 2 years without a mat. I have been just running the bare platter with the LP clamped to it. Is there a need for a mat on this platter?
I didn't think so, but I have been looking at pics here with mats on the platter of the 19jr. Does this make sense?
scottht
VPI says that the acrylic composition in the platter acts as a mass-loaded "sink" that absorbs vibration from the LP caused by the stylus. However, many owners of the various HW-19 models (me included) have tried platter mats to see whether they improve the sound. Over the past 15 years, I've tried a half dozen or so different platter mats on my HW-19 Mk4 (with TNT platter, bearing, etc.), and eventually adopted VPI's cork platter mat. It seems to give the table a slightly more "live" quality, which works well in my system, and for the $10 cost (from VPI) it's certainly an inexpensive solution.
Wow, I own a HW-19 Mk3 and was about to post a similar question. Anyway, I run mine without a mat, though I do won a couple of different mats. I never noticed any sonic difference with or without the mat (I always remembered to adjust VTA) so I ditched it. Aside from sonic benefits/artifacts, does having the mat help protect the "other side" of the LP when it's playing?
I have tried several mats and did not care for any of them. Tweaks, as a general rule, are a real interesting phenomenon. I usually hear differences for sure, but SYNERGY in the system and components is really the key to the best sound I believe.

R.