The new Pro-Ject Speed Box S2 speed controller replaces the old and famous Speed Box S. It nevertheless has the same functions and performances. It is made for entry level turntables and midrange turntables that have a 16V AC synchronous motor.
It comes in a non magnetic anodized aluminium casing. The front panel is also in aluminium. It has a pulse switch which enables you to choose the speed (33 RPM or 45 RPM) as well as two LEDs which correspond to the speed selection.
Its primary function is to enable (by change in frequency) to change the speed of the motor and, in consequence, go from 33 RPM to 45 RPM without having to manually change the belt from one pulley to another (when you do not need to raise the platter!). This is very practical for those who have a collection of singles! However, the Pro-Ject Speed Box S2 speed controller has another function. It has a quartz and microprocessor control that ensure a formidable stability of the rotation of the motor. Its precision of 0,001% translates to a speed stability multiplied by 5. It is important to take into account that it is possible to obtain a rotation at 78 RPM by adapting a specific pulley and by selecting 45 RPM.
It is powered by an external power supply in direct current (DC) of 18 V. We connected it to a Pro-Ject 1-Xpression III turntable and a 2nd generation Pro-Ject 2-Xperience turntable. The results were very convincing. The gain in musicality obtained is undebatable and its user-friendliness make it necessary!
It is advised to use the Pro-Ject Speed Box S2 speed controller with Pro-Ject turntables (Debut 3, Essential 1, Genie 1.3, XPression 1, II and III, RPM 4 et RPM 5, Xperience) and Music Hall turntables (Music Hall 2.2, Music Hall 5.1, Music Hall 7.1…).
CAUTION: the speed box 1,2, and S are not compatible with DC motors: Debut Carbon, Debut Carbon Esprit, Debut Carbon USB, 1Xpression carbon, RPM1 Carbon, RPM3 Carbon, 2Xperience DC, 6Perspex Acryl DC, etc. Franck
Principle: speed controller and stabilizer
Control: by high precision quartz
Speed stability: +/- 0,001 %.
Speed change: 33RPM/45RPM
Optional: 78RPM with adapted pulley
Motor output: 16 v/AC (190 mA)
External power supply: 18 v/DC
Cable length: 40 cm
Dimensions: 103 x 36 x 103 mm
Weight: 300 g (without power supply)