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.

Dynamic balance graduated vertical tracking force (VTF) control through a new spring design
The new short wire spring, housed in the pivot case, eliminates unwanted vibrations in the tone arm
VTF in the range 0-5 grams can be precisely adjusted by means of the supplied digital force gauge
Anti-skate control adjusted by calibrated dial in the range 0-5 gram
Tone arm height, and thereby VTA, is easy adjustable on the tonearm base.
Detachable head shell and tone arm cable, with standard SME-type connectors

Additional information


RS-309D 12″ tonearm Technical data

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


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