Product information Pro-Ject Speed Box MK II Electronically regulated speed change unit for Turntables Features 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 Weight * 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.