
© Pro-Ject Audio Systems · Pro-Ject Speed Box S · Revision 2014.12.19
Dear music lover,
Warning of a hazard for the user, the unit or possible misuse.
AC outlet voltages vary from country to country. Before connecting to the mains, make sure that the
voltage in your area meets the voltage requirements printed on the power supply.
The power supply is used to disconnect the unit from the mains. Make sure that the power supply is easily
accessible at all times. Never handle the device, the power supply while your hands are wet or damp.
Avoid letting liquids enter the device or the power supply. Never place any item containing liquid,
such as a flower vase on or near the device. Never spill any liquid on the device or the power supply.
Never place any naked flame sources, such as lighted candles on or near the device. The product shall not
be used in damp or wet locations, next to a bathtub, sink, swimming pool or any other similar conditions.
Pro-Ject Audio Systems,
Vienna, Austria
18V
Output
~ 16 V
Make all connections whilst the Speed Box S is disconnected from the power supply.
Speed Box S is suitable for turntables which are running with a 16V/AC power supply.
* Compatibility: Speed Box S may not be used with Pro-Ject turntables with a built-in electronic speed
change, a DC power supply, an automatic switch-off, an integrated Phono preamp (with or without
USB), for instance Phono- and Phono/USB models, Debut Carbon (DC), Debut Carbon Esprit (DC),
Debut Carbon Esprit SB (DC), Debut III E, Juke Box, Elemental, RPM 6.1 SB, 1Xpression III
Comfort,2 Xperience Comfort, Xtension9, Xtension10, Xtension12, Signature10, Signature12
Never use any other power supply than the one supplied with the unit.
thank you for purchasing a Speed Box S from Pro-Ject Audio Systems.
* The unit permits electronic speed change of your Pro-Ject record player between 33 and 45 r.p.m. and
also permits the replay of shellac records by allowing ** 78 r.p.m. with an appropriate pulley and cartridge.
In order to achieve maximum performance and reliability you should study these instructions for use carefully.
Safety instructions
Connecting the record player
Connect the power cable supplied *** (polarity
socket of the record player. The original power supply of the record player is then no longer required.
) to the socket Output ~16V and to the power supply
Mains power connection
Connect the low voltage plug from the power supply to the socket Power 18V before connecting the power
supply to the mains.

© Pro-Ject Audio Systems · Pro-Ject Speed Box S · Revision 2014.12.19
To switch on from standby or to standby
** 78 r.p.m. is not available with all Juke Box, Elemental, Essential, Essential II and Debut Carbon
models, all Phono and Phono/USB models, all models with Automatic switch-off (like Debut III E),
1Xpression Carbon, 1Xpression Carbon Classic 2Xperience Basic+, 2Xperience Comfort, 2Xperience
Acryl, 2Xperience DC Acryl, 2Xperience Classic, 2Xperience SuperPack, 2Xperience SB DC,
6PerspeX, 6PerspeX SuperPack, all RPM Carbon models, RPM 1.3 Genie, RPM 9.1, RPM 9.1
SuperPack, RPM 9.1 Acryl, RPM 9.2 Evolution, RPM 10.1 Evolution and Signature 10/12.
The models Debut III/Phono SB, Debut Carbon Esprit SB (DC), 1Xpression III Comfort, RPM 5
SuperPack, RPM 5.1 SuperPack, RPM 6.1 SB, RPM 6.1 SB SuperPack, Xtension 10 and Xtension 12 are
equipped with the 78 r.p.m. pulley as a standard.
The push button on the left hand side will toggle the Speed Box between its fully operational status and
standby. The blue LED above the stand-by push button shows that the unit is switched on.
Speed selection 33/45 r.p.m.
The belt must be on the smaller (50Hz models) larger (60Hz models) diameter part of the motor pulley. Press
the button 33 45 to switch between 33 and 45 r.p.m.. The selected speed is shown respectively by the lit LED.
To play at 45 or ** 78 r.p.m. please always start the turntable at 33 r.p.m. and then switch to the higher speed
when it has attained full speed.
Replay at 78 r.p.m.
** In order to replay shellac records at 78 r.p.m. your turntable must be equipped with the 78 r.p.m. pulley
which is available as an optional accessory for most models.
After fitting the 78 r.p.m. pulley please proceed as follows: Remove the platter and using the tool from the
accessory kit fit the belt around the larger diameter step of the pulley. Replace the Platter, start the turntable
at 33 r.p.m. and switch the speed to 45 r.p.m., the platter will then revolve at 78 r.p.m..
Fitting the 78 r.p.m. pulley
Before beginning work fit the cartridge’s needle protection cover.
Remove the platter and drive belt. Please remember that sweat or sticky fingers will impair the function of the
belt. Use a piece of kitchen paper or a cloth to remove the belt.
Measure the height of the pulley above the plinth in order to ease correct refitting.
Using a small screwdriver loosen the grub screw in the neck of the pulley just enough to remove the pulley
vertically without using force. Refit the pulley in the opposite order. Tighten the grub screw carefully making
sure you do not overtighten it.
Fit the drive belt around the subplatter and the pulley. Again, use a piece of paper or cloth to avoid soiling
the belt. Replace the platter.

© Pro-Ject Audio Systems · Pro-Ject Speed Box S · Revision 2014.12.19
Technical specifications Pro-Ject Speed Box S
The manufacturer accepts no responsibility for damage caused by not adhering to these instructions
for use. Modification or change to any part of the product by unauthorized persons release the
manufacturer from any liability over and above the lawful rights of the customer.
Pro-Ject Audio Systems is a Registered Trademark of
H. Lichtenegger.
This guide was produced by: Pro-Ject Audio Systems
Copyright © 2014. All rights reserved.
The information was correct at the time of going to
press. The manufacturer reserves the right to make
changes to the technical specification without prior
notice as deemed necessary to uphold the ongoing
process of technical development.
Nominal speeds: * 33 and 45 r.p.m. ** Optional 78 r.p.m.
Quartz oscillator: Speed stability +/- 0,001%
*** Length power cable: approximately 40cm
Turntable connection: 16V/AC 190mA max. (3W power consumption max.)
Outboard power supply: 18V/500mA DC, suitable for your country's mains supply
Dimensions W x H x D (D with sockets): 103 x 36 x 104 (104)mm
Weight: 560g without power supply
Service
Should you encounter a problem which you are not able to alleviate or identify, please contact your dealer for
further advice. Only when the problem cannot be resolved there should the unit be sent to the responsible
distributor in your country.
Warranty
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