PRO-JECT Speed Box S electronic speed control (Colour:Black)




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The Speed Box S is a very useful accessory for Pro-Ject turntables that do not offer a built-in electronic speed change. It performs with the push of a button, allowing extremely easy switching between 33 and 45 rpm. The quartz regulation and filter circuit provide optimised speed stability for smooth and undisturbed motor operation. The Speed Box S is compatible with Pro-Ject turntables as listed below.

 Compatible with Debut Carbon, 1 Xpression III & Classic, RPM 5.1, Essential 2, 6-perspeX, RPM 1.3, RPM 9.2, RPM 10.1.


• 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  

• Outboard power supply included  

• Available in silver or black finish  


Input: 18V DC

Output: 16 V AC / 190mA (up to 3W max)

Speed stability: +/- 0,001%

Power supply: 18V/500mA DC

Dimensions: 103 x 36 x 104 mm (WxHxD)

Weight: 560 g without power supply


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) 


This is a review of the Speed Box MkII.

Paul Candy at 6moons says “… "it is essentially an electronic speed regulator. As with my 1 Xpression, the results were readily noticeable and well worth the asking price. Both ends of the frequency spectrum were slightly more resolved and the sense of natural flow and drive increased a tad. There was also greater focus and definition. For example, an acoustic bass was more solid and you could sense its resonating body to a higher degree as well as its driving pulse. Violins and vocals were less sibilant and more intelligible. It's a no brainer: if you own a Pro-Ject turntable, I can't think of a more cost effective upgrade than adding a Speed Box."”



Shipping Weight 1.2000kg
Shipping Width 0.260m
Shipping Height 0.070m
Shipping Length 0.240m

1 Year Warranty

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