Ratio Electric Locking Machine Heads 3+4 (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Locking Machine Heads 3+4 (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Locking Machine Heads 3+4 (please select finish and button style) - Graph Tech Guitar Labs Ltd.

7 String: 3+4 Ratio Electric Locking Machine Heads (PRL-8621, Select Finish and Button Style)

PRL-8621-C7

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 B to High E 48:1, 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 PRL-8621 is a right-handed set of Locking RATIO® Calibrated Machine Heads for electric guitar that use 3 x 4 tuner configuration.

Fits many Jackson, Schecter, and Ibanez (selected) style guitars and a lot of acoustic guitars if you want to upgrade to a locking set of machine heads.

 

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.

 

3x4 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: 0.910” (23mm)
Weight per single machine head: 0.083lbs (38g)
Weight per set: 0.581lbs (266g)
String diameter up to 72 gauge
Includes 7 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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