Pro-Ject Audio Systems Pro-Ject Signature 12 - Manual (Page 11)

OPERATING AND CALIBRATION
1. Cartridge setting
Effective length = 304.8mm (12”)
(distance between needle of the cartridge and the vertical rotation axis of the tonearm)
Mounting distance= 291.6mm
(distance between spindle and the vertical rotation axis of the tonearm)
Outer nullpoint: r= 62,5mm
For correct setting use the protractor or Pro-Ject Align It tool.
Tool for cartridge alignment and adjustment
Special slip-proof tool for defining the turning centre of tonearm
Adaptable to accommodate differing tonearm lengths
Suitable for other manufacturer’s tonearms