Owner's Manual

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!
Product information
01. 2013
Update: DZ Datum 07.10.2013
Speed Box S
Electronic motor control and speed change
• 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%
FINISH Front black or silver
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-;SUHVVLRQ,,,&RPIRUW
X-tension (all types)
For older turntables, consult your dealer!
PRO-JECT AUDIO SYSTEMS
a division of AUDIO TUNING GmbH
1050 Wien, Margaretenstraße 98
Faceplate in silver
Rear panel:
DC in & AC out
Retail price
129,00 €