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About the AS-309S 12"
The Ortofon AS-309S 12" tonearm is a static-balance arm developed and built by Jelco in Japan for Ortofon. It features a high-quality aluminum tonearm with a die-cast zinc shaft, combining modern precision with a nod to analog's past. It supports a wide range of cartridges and includes anti-skating control. The arm uses Japanese geometry, which differs from the Baerwald alignment, and requires an additional counterweight for SPU cartridges. It has an SME-type detachable headshell connector for easy cartridge installation. The AS-309S is positioned in the middle of Ortofon's audiophile tonearm range and was originally It is no longer in production and considered a historical product.
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