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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. SPU cartridges require an additional counterweight.

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.

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