A very useful accessory for most Pro-Ject turntables (excluding turntables listed below), that do not have built-in electronic speed change. The Speed Box II performs this change by the push of a button between 33 and 45 rpm. The quartz regulation and fi lter circuit gives a stable speed reference. Good sound from sound technology • Quartz-generated high precision electronic speed regulation • Clean Quartz clock generated sinus wave voltage decoupled from mains interference Features • Metal case shields the electronic from vibrational and electromagnetic nterference • Small size allows installation close to record player • * Electronic speed change between 33 and 45 r.p.m. • ** 78 r.p.m. also possible after fitting accessory pulley • All functions microprocessor controlled • Outboard power supply included • Available in silver finish.