Ortofon 12″ Tonearms

RS309-D
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.


Features

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


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)

1 x Digital scale DS-1 included

1 x Headshell SH-4 Black included, headshell weight 9.4 g, screws weight 2 g

1 x Tonearm cable included

1 x Mounting template included


Please note: The AS-212S, AS-309S, RS-212D and RS-309D tonearms have a Japanese geometry, which will not directly fit the normal Baerwald alignment. Baerwald alignment has a zero tracking angle error at 66mm and 120.9 mm distance from the center of the platter.

Please read our recommendations for alignment of RS and AS tonearm models here.

Ortofon AS-309S 12″ static-balance tonearm

Ortofon AS-309S 12 inch static-balance tonearm features high quality materials and construction, combined with a nod to analog’s past, for precise sound reproduction combined with a modern-vintage aesthetic.

AS series tonearms can be used for a wide array of cartridges and feature anti-skating control. The AS series tonearms are an excellent choice for use with SPU’s with the Ortofon SPU counterweight.

AS-309S 12″ tonearm Technical data

Effective mass (without headshell)  – 4.0 g

Effective length (distance between the stylus and pivot point)  – 329mm

Mounting distance between the pivot point and turntable center  – 314mm

Offset angle  – 19 degrees

Overhang  – 15mm

Tracking force adjusting range ( direct reading)  – 0 to 3g

Height adjustment range  – 35mm to 55mm

Diameter of the armbase mounting hole  – 19mm to 20mm

Diameter of center shaft  – 18mm