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The Speed Box S offers a functional and convenient upgrade for many Pro-Ject turntables with a 16V AC motor that do not already have built-in speed control.
The Speed Box S acts as an AC generator for the turntable, replacing the fluctuant supply from a normal 16V power supply and regulating it. The result is a clean power signal that allows the motor to perform optimally. The added convenience is that the Speed Box S can shift frequency, for easy changing between 33 and 45RPM at the push of a button.
Inside, the Speed Box S makes use of high-quality materials in the quartz-controlled oscillator and filter circuits. Externally it is stylish, compact and minimal - matching any other Box Design S Line component.
Connection is simple, as the Speed Box S is supplied with a link cable that plugs into your turntable instead of the normal power supply. There is also a wide range of compatibility (see below), and in some cases the Speed Box S can even add 78RPM compatibility, when partnered with a special Speed Box Pulley.
For a full compatibility list, read our FAQ
|Input Power:||18V DC (Supplied PSU)|
|Output Power:||16V AC / 190mA (3W max.)|
|Nominal Speeds:||33 / 45 RPM
78 RPM with Optional Pulley
|Speed Stability:||± 0.001%|
|Power Cable Length:||Approx. 400mm
(Turntable to Speedbox)
|Dimensions:||103 x 36 x 104mm
103 x 36 x 115mm (Incl. Sockets)
Will the Speed Box S work with my turntable?
The Speed Box S will only work with certain Pro-Ject turntable models that have a detachable mains socket and a 16V AC power supply. It will not work with items that have a captive mains lead, or a DC power supply. To make your compliant turntable turn at 78RPM, you will need to purchase the additional 78RPM Pulley and a 78RPM stylus.
Below is a list of compliant turntables...
Works with Speed Box S (and turns at 78RPM with additional pulley):
Works with Speed Box S (33 and 45RPM only):
The Speed Box S will not work with any turntable that has a captive mains cable.
The Speed Box S will not work with any turntable that has a DC power supply.
The Speed Box S will not work with any turntable that has speed control or a USB phono stage built-in.
If your turntable is not in the list above, or if you are unsure, please Contact Us for confirmation of compatibility.
For more help and advice visit our Tech Support section