Replacement mounted Speed Box, as supplied on the turntables listed below. This small device uses many of the same components as the popular Speed Box II design, but it fits them into a chassis that screws comfortably underneath certain Pro-Ject turntables. This accessory allows for easy changing between 33 and 45 RPM, and can also offer 78 RPM control when the turntables are fitted with an alternative pulley. Compatibility List: RPM 6.1 SB Debut III Phono SB

Project Audio Systems Speed Box - SOLD