Pro-Ject Speed Box SE II  

Electronically regulated speed change unit for Turntables  


Speedboxse: click to enlarge

open page Specifications       PDF Productinfo [pdf, 74 KB]       PDF User Manual [pdf, 92 KB]       

The Quartz-controlled oscillator of the Speed Box SE II generates clean AC-power without mains distortion. Power outputs are galvanic decoupled from the input current. Many turntables in the market (including all the Pro-ject models) use AC synchronous motors and the Speed Box SE II can be used for ultimate speed consistency and electronic speed change between 33 and 45rpm. Additionally, speed can be altered in graduated steps on either setting.  


Good sound from sound technology  

• Quartz-generated high precision electronic speed regulation  

• Voltage regulation function  

• Mains filter  

• Clean Quartz clock generated sinus wave voltage decoupled from mains interference  



• Can acts as a power supply for both mains and 16V/AC units  

• Metal case shields the electronics from vibrational and electromagnetic interference  

• * Electronic speed change between 33 and 45 r.p.m.  

• ** 78 r.p.m. also possible after fitting accessory pulley  

• Pitch control  

• Digital display showing replay speed  

• All functions microprocessor controlled  

• Outboard power supply included  

• Available in silver or black finish  


* Following models may not be used with the Speed Box SE II: Pro-Ject 1.2 E, Debut Phono, Debut Phono USB, Debut III E, Debut III/Phono SB, 1Xpression III Comfort, 2Xperience Comfort, RPM 6.1 SB, RPM 6.1 SB SuperPack, RPM 9.1 SuperPack und Xtension  


** 78 r.p.m. is not available with the Essential (all models), Debut III E, 2Xperience Comfort, 2Xperience Acryl, 2Xperience Classic, 2Xperience SuperPack, 6perspeX, 6perspeX SuperPack, RPM 1.3 Genie, RPM 9.1, RPM 9.1 SuperPack, RPM 9.1 Acryl, RPM 9.2 Evolution and RPM 10.1 Evolution.  


Debut Carbon and Debut Carbon Esprit can be used with the Speed Box SE II because a 230 volt connection is available.  

Turntables from other manufacturers can also be used with the 230 volt connection.  


Last update 14.06.2018

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