Grado Green3The Green3 uses a three piece OTL cantilever that has a Grado specific diamond mounted on a brass bushing. What's the difference between Black3 and Green3? Approximately 15% of the Black3 production run meets higher specifications. These are hand selected from the batch and designated as Green3. Grados OTL, or optimized transmission line, technology provides an ideal transfer of signal from the surface of the LP to the generator of the system. This
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