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Ratio PRB-4401-C0 4 String Bass In-Line Open Back - Chrome

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In order to achieve the higher gear ratio's, Ratio's are the worlds 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 48:1, 36:1, 25:1, and 23:1.