Pro-Ject Speed Box MkII
Electronically regulated speed change unit for Turntables
Speed Box MkII is a microprocessor driven power supply specially designed for supplying audiophile turntables with synchronous motors. Exact frequency and amplitude of output voltage is ensured by using a quartz oscillator and amplifier with extremely low distortion. The combination of these factors results in very smooth and quiet motor run, which never can be obtained by using a standard adapter.
Paul Candy at 6moons says “… it is essentially an electronic speed regulator. As with my 1 Xpression, the results were readily noticeable and well worth the mere US$119 asking price. Both ends of the frequency spectrum were slightly more resolved and the sense of natural flow and drive increased a tad. There was also greater focus and definition. For example, an acoustic bass was more solid and you could sense its resonating body to a higher degree as well as its driving pulse. Violins and vocals were less sibilant and more intelligible. It's a no brainer: if you own a Pro-Ject turntable, I can't think of a more cost effective upgrade than adding a Speed Box.”
Features
- Electronic speed change between 33 and 45 r.p.m.*
- 78 r.p.m. also possible after fitting accessory pulley**
- Quartz-generated high precision electronic speed regulation
- All functions microprocessor controlled
- Available in black and silver
- Only models with mains socket 16V/AC power supply
* The Pro-Ject Debut III E, Debut III/Phono SB, Xpression II Comfort, Xperience Comfort and RPM 6.1 SB can not be used with the Speed Box
** 78 r.p.m. is not available for the Pro-Ject Debut III E, Xperience, Xperience Comfort, Xperience SuperPack, RPM 9.1, RPM 9.1X and RPM 10.
Technical data |
Pro-Ject Speed Box II |
| Nominal speeds |
* 33 and 45 U/Min. ** Optional 78 U/Min |
| Turntable connection |
16V/AC 190mA max. (3W power consumption max.) |
| Quartz oscillator |
Speed stability ± 0,01% |
| Power supply type |
Mains-fed outboard power supply |
| Output voltage |
16V/500mA AC |
| Dimension W x H x D |
103 x 38 x 103mm |
| Weight |
540g without power supply |
Speed Box MkII brochure
