Pro-Ject Speed Box S  

Electronic motor control and speed change  


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open page Specifications       PDF Productinfo [pdf, 113 KB]       PDF User Manual [pdf, 111 KB]       

Quartz-generated high precision electronic speed regulation with microprocessor control  

Sound improvement through motor running smoothness  

Clean power decoupled from mains interference  

Allows electronic speed change 33 & 45 rpm  

78 rpm possible with optional accessory pulley  

Suitable for all turntables with 16 volt AC motor, up to 3 watt max. power consumption  

Metal case shields electronics from vibration and electromagnetic interference  

Small size allows installation close to record player  

DC power supply (< 1 watt standby power)  

Available in silver or black finish  


Upgrade to best possible turntable performance with convenient speed changeover through keypress!  


A very useful accessory for many Pro-Ject turntables, that do not offer a built-in electronic speed change. The Speed Box S performs this change by the push of a button between 33 and 45 rpm! The quartz regulation and filter circuit gives a far better speed stability for smooth and undisturbed motor operation. Speed Box S is compatible with a lot of Pro-Ject turntables (see list above) and some also offer the possibility to play 78 rpm records with the addition of a special accessory pulley!  


SRP: 129,00  



These turntables with 16 volt AC motor are compatible with Speed Box S:  


33/45 (78 with optional pulley):  

Pro-Ject Debut III, Debut Carbon (only US version with 16 volt motor), 1-Anniversary, Art-1, 1-Xpression III & Classic, RPM-5.1  


33/45 (no 78 available, because pulley can not be exchanged):  

Essential, 2-Xperience Acryl & Classic, 6-perspeX, RPM-1.3, RPM-9.1X, RPM-9.2, RPM-10.1  


Caution! Do not use Speed Box S with following turntables:  

Debut III E, Debut II Phono USB, Debut Carbon (all non-US versions), Essential Phono USB, Juke Box (all types), 1-Xpression III Comfort, X-tension (all types)  


For older turntables, consult your dealer!  



Last update 18.07.2018

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