Graphtech RATIO Electric Locking 6 In-line Fender Style Nickel Open Back PRN-4624-N0

The PRN-4624-N0 is a right-handed set of Ratio Tuned Machine Heads in retro look for electric guitar that use 6-in-line side tuners. Open backs.

Fits vintage style guitars (e.g. Fender Style).

Ratio - Tuned 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.

Please note that our retro tuners are made to a vintage specification (for 11/32” peghead holes) and will not be a direct replacement for a modern tuner. Please check drawings for compatibility here: "Retro Ratio Tuners Measurements".

Ratio - Tuned Machine Heads are the first and only machine head to incorporate the different string gauges into the tuning equation. We balanced the individual gear ratios to each string dramatically simplified the tuning process. No more overshooting the G string or twisting away on the high E string. With Ratio, each half key turn equals one semitone change on all strings! Quicker, more accurate tuning on every string.

Standard Machine Heads - Installation Guide
Standard Machine Heads - Actual Size Template & Dimensions

InvisoMatch Mounting Plates - Actual Size & Dimensions

THE SIMPLE GENIUS BEHIND RATIO¨ TUNED MACHINE HEADS

We've tuned the gear ratios to each string position so that every string responds the same to any tuning adjustment. You get fine tuning on the thicker core strings and coarser tuning on the thinner core; anywhere from 12:1 to 39:1 gear ratio. With Ratio¨, one turn is about one tone change on all strings, making tuning, retuning and open tunings easier, quicker and more intuitive.

PREDICTABLE, PRECISE TUNING, RETUNING AND OPEN TUNINGS.

Ratio¨ tuning feels natural. You don't have to think about which string you are tuning because they all feel and respond the same. No more overshooting the Low E or G. No more twisting away on the High E or D string. Open tunings have never been easier. String gauges such as light top, heavy bottom are no problem with Ratio¨; they still do the same precision tuning.

NOT JUST ANOTHER MACHINE HEAD.

Ratio is more than just another entry into the machine head market. Instead, Ratio has reinvented how machine heads function with the musician.