Speed Box S is suitable for turntables which are running with a 16V/AC power supply. * Compatibility: Speed Box S may not be used with Pro-Ject turntables with a built-in electronic speed change, a DC power supply, an automatic switch-off, an integrated Phono preamp (with or without USB), for instance Phono- and Phono/USB models, Debut Carbon (DC), Debut Carbon Esprit (DC), Debut Carbon Esprit SB (DC), Debut III E, Juke Box, Elemental, RPM 6.1 SB, 1Xpression III...
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