Why should I buy a platter mat?
You should already have a platter mat from when you bought the turntable, as it acts as important dampening between the rumble of the motor and the stylus.
Of course, different materials have different properties such as lifespan, weight, hardness, etc. All of which will affect your sound differently. It all comes down to which you think sounds better. That or you’ve left your deck in the attic for 30 years and the rubber has gone all hard and crumbly, and you’ll be needing a new one.
You can get platter mats in a wide range of materials like glass, metal, carbon fibre and acrylic, but the more common ones are made of cork and/or rubber.