Pro-Ject HUM BLOCK IT can be grounded directly to an audio system. Many DC power components are not able to be physically connected to the ground and therefore electrically grounded. This problem can in some cases cause a noise phenomena, that manifests itself in the a hum, crackling and hiss.
The Pro-Ject HUM BLOCK IT connects amplifier, phono preamplifier or the turntable directly to the ground. With this you can avoid the potential differences between various devices. Pro-Ject HUM BLOCK IT also helps with limiting of the various sources of noises and hum. Playback quality is greatly increased with this simple and efficient device.