It is as it came when I bought it Nathan. The only other mat I've tried on it is an old Avon Audiomat. The Audiomat adds a lot of mass to the already weighty platter and probably helps with speed stability, although not to the extent that I can notice the difference. It does dull the edge of high frequencies a little compared to the other arrangement though, which is why I've stuck with the acrylic and Sorbothane mats. I'm not willing to experiment too much on the 160 as it stands until I've got it housed on a solid platform and off my suspended floor, there really is no point until then.