RATIO patented gear technology
RATIO – Calibrated Machine Heads incorporate different string gauges into the tuning equation.
From Low E to High E 39:1, 24:1, 20:1, 35:1, 20:1, 12:1.
We balanced the gear ratios to each string simplifying the tuning process.
With RATIO, a half-turn is a semi-tone!
Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string.
The PRN-4324 and PRN-4424 are the right-handed sets of open RATIO Calibrated Machine Heads in a retro look for electric guitars that use 3+3 side tuners.
Fit vintage-style guitars.
Please note that our open-back guitar tuners are made to a vintage specification (11/32 / 8.71mm peghead holes), however, we do stock bushings with a larger outer diameter for modern day headstocks (13/32 / 10.23mm peghead holes) They are available upon special request [email protected]. Please check the specifications below:
Ratio Open Back Bushing Large:
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