Ratio Electric Guitar Machine Heads 6 in-line (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Guitar Machine Heads 6 in-line (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Guitar Machine Heads 6 in-line (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Guitar Machine Heads 6 in-line (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Guitar Machine Heads 6 in-line (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Guitar Machine Heads 6 in-line (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Guitar Machine Heads 6 in-line (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Guitar Machine Heads 6 in-line (please select finish and button style) - Graph Tech Guitar Labs Ltd.

6-In-Line Ratio Electric Guitar Machine Heads (PRN-2721, 2731, Select Finish and Button Style)

PRN-2721-C0
Select Finish
Select Button Style

SCIENCE BEHIND RATIO:

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.

RATIO Machine Heads explanation video

 

Description:

The PRN-2721 and PRN-2731 are a right-handed sets of RATIO® Calibrated Machine Heads for electric guitar that use 6-in-line tuners.

It has a two pin casing that can be used as is, or with our Patented InvisoMatch Mounting Plates [opens in new tab].

4 different sets of InvisoMatch mounting plates in brushed aluminum are included to make installation on most guitars fast and accurate by using your existing screw mounting holes.

 

6-in-line tuners set  Ratio Tuned Machine Heads: The New Standard In Tuning Technology

 

Specification:

Gear ratio: unique for each string position - one turn-one tone
Peg holes diameter required: 13/32" (10mm)
String post diameter: 0.236" (6mm)
String post length to string hole: 0.890” (22.6mm)
Weight per single machine head: 0.066lbs (30g)
Weight per set of six: 0.393lbs (179g)
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings
Includes complimentary 4 sets of aluminum mounting plates

GUIDES:

Staggered Ratio Measurements.pdfRatio Installation Guide.pdfRatio Installation Guide Video

REVIEWS:

Moss Hart

Reviewed in the United States on February 15, 2020

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