Pro-Ject Debut PRO BTechnical Specifications Speed: 33, 45 (78) (electronic speed change) Drive principle: belt drive with electronic speed control Platter: 300mm, die cast aluminium platter with TPE damping and felt mat Platter bearing: high precision stainless steel axle in bronze bushing Wow & flutter: 33: + 0,16%; 45: + 0,14% Speed drift: 33: + 0,40%; 45: + 0,50% Signal to noise: 68dB Tonearm: 8,6 one piece carbon aluminium tonearm Effective arm length mass: 218,5 mm