Price:

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