Pro-Ject Clamp It Aluminium Record Clamp - SilverFunctional and easy to use sound improvement! Your vinyl sound can be significantly improved by coupling your vinyl and platter surfaces effectively. Here's what the Clamp It offers: Standard record pucks (which use weight to achieve this) have some disadvantages: 1) The weight can induce higher levels of rumble when used with lower cost turntables having less massive main bearings. 2) Instead of tightening the records surface to the platter, heavy