Graph Tech Ratio Machine Heads – Ultimate Control & Precision
Graph Tech Ratio 4 String Bass Tuners - 4-in line Classic Clover Leaf Button Open Back - PRP-4401-C0
The PRB-4401 is a right handed set of RATIO® Calibrated Machine Heads for BASS that use a 4-in-line configuration.
Ratio for bass machine heads is a tuning
system that increases the predictability and efficiency by taking the guess
work out of tuning. On conventional bass machine heads, each strings’s machine
head has the same gear ration; however, each string has a unique string
diameter, causing each of the strings to react differently to the turn of the
machine head. With Ration for bass, each string has its own specific gear ratio,
so that every string reacts to the same turn of a machine head.
RATIO® patented gear technology
RATIO® - Calibrated Machine Heads incorporate different string gauges into the tuning equation.
From Low E to G - 48:1, 36:1, 25:1, and 23:1.
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.
Gear ratio: unique for each string position - one turn-one tone
Peg holes diameter required: 0.720" (18mm)
String post diameter: 0.547" (13.9mm)
String post length to string hole: 0.807” (20.5mm)
Weight per single machine head: 3.5oz (99.3g)
Weight per set of four: 14oz (397g)
String diameter up to 130 gauge
Includes 4 machine heads, mounting screws and bushings
