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Equipment > PRO-JECT - SPEED BOX S
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Pro-Ject Speed Box S

Change Your Platter Speed Without Moving the Belt

The "S" version of the very popular Speed Box motor drive, is more powerful and has higher quality parts for even greater speed stability. No longer tiny, the Speed Box S greatly improves speed stability, which means quieter, blacker backgrounds, excellent bass performance and a smoother, sweeter tonal balance. Highly Recommended for Pro-Ject and Music Hall turntables.

The Pro-Ject Speed Box S is a cost-effective way of providing electronically regulated speed change and stability for many Pro-Ject turntable models. A high-precision quartz regulator provides rock steady speed, while the quartz clock generates a clean sine wave voltage, rejecting noise and interference. All functions are microprocessor controlled for accuracy and quick response. A heavy shielded metal case keeps noise and interference to an absolute minimum. The Speed Box S includes a 16-inch detachable connecting cable for interfacing the unit with the turntable.

  • 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 turntable
  • Outboard power supply included

Do not use Speed Box S with following turntables:
Debut III E, Debut II Phono USB, Debut Carbon (all non-US versions), Debut Carbon DC, Essential Phono USB, Juke Box (all types), 1-Xpression III Comfort, X-tension (all types)

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Nominal Speeds: 33 / 45 RPM *Optional 78 rpm.
Quartz Oscillator: Speed Stability +/- 0,001%
Turntable Connection: 16V / AC 190mA max. (3W power consumption max.)
Power Supply: 18V / 500mA DC
Dimensions (WHD): 4.1" x 1.4" x 4.2"
Weight: 1.3 lbs without power supply

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User Manual (PDF, 68 KB)

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