I would think that layer of felt would help to reduce rumble and vibration in the table. What other materials are mats made of?
Turntable
I am going to purchase a new turntable, it will have a solid hardwood plinth. It will come with a OA2 gimbal tonearm, have a acrylic platter and a Ortofon 2M Blue cartridge. It comes with a felt mat, wondering if it would be fine to play records on just the acrylic with out the felt mat or should I use the felt mat provided