Ratio Electric Locking Machine Heads 6 in-line (staggered posts) - (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Locking Machine Heads 6 in-line (staggered posts) - (please select finish and button style) - Graph Tech Guitar Labs Ltd.
Ratio Electric Locking Machine Heads 6 in-line (staggered posts) - (please select finish and button style) - Graph Tech Guitar Labs Ltd.
6 In Line Ratio Electric Locking Machine Heads (Staggered Posts) - (Select Finish and Button Style) - Graph Tech Guitar Labs Ltd.
6 In Line Ratio Electric Locking Machine Heads (Staggered Posts) - (Select Finish and Button Style) - Graph Tech Guitar Labs Ltd.
6 In Line Ratio Electric Locking Machine Heads (Staggered Posts) - (Select Finish and Button Style) - Graph Tech Guitar Labs Ltd.
6 In Line Ratio Electric Locking Machine Heads (Staggered Posts) - (Select Finish and Button Style) - Graph Tech Guitar Labs Ltd.

6-In-Line Ratio Electric Locking Machine Heads Staggered Posts (PRL-9721, Select Finish and Button Style)

PRL-9721-C0 1 review
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 PRL-9721 is a right-handed set of Locking RATIO® Calibrated Machine Heads for electric guitar that use 6-in-line tuners with staggered posts (eliminates the need for a string tree).

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 Staggered 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: 0.827” (21mm) - 0.787" (20mm) - 0.748" (19mm)
Weight per single machine head: 0.083lbs (38g)
Weight per set of six: 0.496lbs (225g)
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:

Nacho

Reviewed in the United States on February 16, 2020

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Filter Reviews:
MB
01 May 2022
Michael B.
United States United States
I recommend this product

Works Very Well

The half turn for half step varies with string gauge. Intuitively, this makes sense. But, you will be close to in-tune. Way better than with typical machine heads. The locking feature works correctly. No more cursing at the situation before the string is allowed to pass through its hole in the peg. I have these tuners on a Strat, and I appreciate not needing to use the string trees any more. Great feature.

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