Plinth

The plinth is the turntable's main body or base, the structure that houses the motor, the platter bearing, and the mounting point for the tonearm, all in one rigid chassis. Everything else on a turntable is built onto or into the plinth.

A plinth's job is largely about damping and rigidity, keeping the motor, bearing and tonearm mount in stable alignment with each other while resisting outside vibration from reaching the record. Materials range from dense MDF and particleboard to acrylic, metal or layered composite designs, each offering a different balance of mass, rigidity and resonance behavior, which is part of why identical electronics in different plinths can sound noticeably different.

When evaluating a turntable, a heavier, well braced plinth generally handles isolation better than a thin, light one, though placement and a good stand still matter alongside it. Some higher end turntables offer add-on isolation platforms or feet specifically designed to work with their plinth design. A common misconception is that plinth material barely matters compared to the cartridge or tonearm, when in practice a poor plinth can undermine the performance of even a very good cartridge by letting more vibration through.