Graphtech PRN-2411-C0 | Ratio Tuners | 12:1 to 39:1 Acoustic 3 x 3 chrome

Ratio by Graph Tech Model # 2411-C0 (12:1 to 39:1) Acoustic 3×3

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, 14:1, 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-2411 and PRN-2421 are the right-handed sets of RATIO® Calibrated Machine Heads for acoustic guitar that use 3 per side tuners.

It has a two-pin casing that can be used as is, or with our Patented InvisoMatch Mounting Plates.

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

(See video)

Specifications

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: 0.066lbs (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 aluminium mounting plates