Graph Tech PRB-4220-B0 Bass Ratio Tuners
Replace your bass guitar tuners with this pristine set of calibrated machine heads, equipped with Ratio technology that makes precise tuning quick and easy!
Overview
The Graphtech PRB-4220 is a right-handed set of RATIO Calibrated Machine Heads for BASS that use a 2 x 2 configuration.
- RATIO - Calibrated Machine Heads incorporate different string gauges into the tuning equation.
- From Low E to G - 36:1, 30:1, 20:1, 18:1.
- Graph Tech 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.
- Includes 4 machine heads, mounting screws, and bushings
Features:
- RATIO patented gear technology- RATIO - Calibrated Machine Heads incorporate different string gauges into the tuning equation.
- From Low E to G - 36:1, 30:1, 20:1, 18:1.
- Graph Tech 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.
- Includes 4 machine heads, mounting screws, and bushings
Specs
- Gear ratio: unique for each string position - one turn-one tone
- Peg holes diameter required: 35/64" (14mm)
- String post diameter: 0.547" (13.9mm)
- String post length to string hole: 1.030" (26.1mm)
- Weight per single machine head: 1.86oz (53g)
- Weight per set of four: 7.44oz (212g)
- String diameter: up to 0.98 gauge (or larger if taper-wound)
- Peg holes diameter required: 35/64" (14mm)
- String post diameter: 0.547" (13.9mm)
- String post length to string hole: 1.030" (26.1mm)
- Weight per single machine head: 1.86oz (53g)
- Weight per set of four: 7.44oz (212g)
- String diameter: up to 0.98 gauge (or larger if taper-wound)
- Dimensions and Weight in Packaging
- Base Item
- Shipping Weight: 0.6 lbs
- Shipping Dimensions: 5 x 3 x 2 in
- Manufacturer Part Number (MPN): PRB-4220-B0
Documents and Manuals
For support or warranty questions, please contact the manufacturer:
Phone: 800-388-7011
Email: support@graphtech.com
Web: https://graphtech.freshdesk.com/support/home
Phone: 800-388-7011
Email: support@graphtech.com
Web: https://graphtech.freshdesk.com/support/home
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