Ortofon RS-309D 12" dynamic-balance tonearm

RS-309D 12 inch Ortofon’s D series tonearm takes analog sound reproduction to a higher level with highly configurable VTF options and a dynamic balance system for increased stability when tracking warps and other anomalies.

D series tonearms can be used for a wide array of cartridges, feature anti-skating control.

Effective mass (without headshell)  - 4.0 g
Effective length (distance between the stylus and pivot point)  - 329 mm
Mounting distance between the pivot point and turntable center  - 314 mm
Offset angle  - 19 degrees
Overhang  - 15 mm
Tracking force adjusting range (direct reading)  - 0-5 g
Height adjustment range  - 42-57 mm
Diameter of  the armbase mounting hole - 34-36 mm
Diameter of the center shaft  - 16 mm
Fixing holes PCD  - dia. 50 mm
Size/Thread  - dia. 3.2 mm (dia. 3 mm x 20 mm and dia. 3 mm wood screw)
Digital scale DS-1 included
Headshell SH-4 Black included, headshell weight 9.4 g, screws weight 2 g