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Ratio PRB-4220-C0 4 String Bass 2+2 Y-Style Button - Chrome

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In order to achieve the higher gear ratio's, Ratio's are the world's first machine heads using a double envelope gear design with a hardened steel gear. Amazingly smooth and super strong.

  • One full rotation of any key results in a one full tone pitch change (give or take). From Low E to G, the gear ratio's are 36:1, 30:1, 20:1, and 18:1.