Isolation

Isolation refers to keeping outside vibration, from speakers, footsteps, or a shared shelf, from reaching the turntable and platter while a record plays. Any vibration that does reach the stylus gets picked up along with the music and reproduced as unwanted rumble or, in bad cases, audible feedback.

This matters more than many beginners expect, since speakers placed too close to or on the same surface as a turntable can create a feedback loop where bass frequencies from the speakers physically shake the turntable and get picked up by the stylus, muddying the sound or causing a low rumble. A dedicated, sturdy stand or isolation feet under the turntable itself both help by decoupling it from the surface it sits on.

When addressing isolation, start with placement, moving speakers further from the turntable or onto separate stands, before spending money on isolation feet or platforms, since positioning alone solves a large share of the problem for many setups. Heavier, more rigid plinths and stands generally resist vibration better than light, wobbly ones. A common mistake is buying expensive isolation feet while leaving speakers sitting directly next to the turntable on the same unsupported shelf, which limits how much the feet alone can help.