Power Supply for PowerStrip, Workhorse Cube, and JDV MK5 This power supply is a 500mA power supply for Radial's Workhorse Cube and PowerStrip 500 Series chassis, as well as the JDV MK5 active DI box — three GearNuts favorites.Radial 500mA Power Supply Features: Power supply for Radial Workhorse Cube, PowerStrip, and JDV MK5 4-pin XLRF connector 500mA, +/-15V, +5VDC