Product information
Pro-Ject Speed Box MK II
Electronically regulated speed change
unit for Turntables
Metal case shields the electronics from vibrational and electromagnetic interference
Small size allows installation close to record player
* Electronic speed change between 33 and 45 r.p.m.
** 78 r.p.m. also possible after fitting accessory pulley (78 r.p.m. with 50Hz model only)
Quartz-generated high precision electronic speed regulation
All functions microprocessor controlled
Outboard power supply included
Technical specifications
Nominal speeds
Quartz oscillator
Turntable connection
Power supply type
Output voltage
Dimension W x D x H
* 33,33 and 45,11 r.p.m.. Optional ** 78 r.p.m.
Speed stability +/- 0,01%
16V/AC 190mA max. (3W power consumption max.)
Mains-fed outboard power supply
16V/500mA AC
105 x 120 x 38mm
540g without power supply
The manufacturer reserves the right to alter the technical specifications without notice.
Available in silver or black finish.
Only models with mains socket 16V/AC power supply.
* The Pro-Ject Debut III/Phono SB and RPM 6.1 SB may not be used with the Speed Box MK II.
These models are equipped with an electronic speed change between 33 and 45 r.p.m as a standard.
** 78 r.p.m. is not available with the Pro-Ject Xperience, Xperience „SuperPack“, Pro-Ject RPM 9.1 and the
Pro-Ject RPM 9.1X.
The Pro-Ject Debut III/Phono SB and RPM 6.1 SB are equipped with an mechanic speed change for 78 r.p.m..
Switching to 78 r.p.m. with the Perspective is done by exchanging the motor and belt.