Detail 01
Unique ratio for each string position
The set is calibrated so each string responds consistently to a tuning adjustment.
Product detailSKU #1500000398483
Graph TechRatio 2+2 Bass Y-Style Button Black 4 String
Independent shopping perspective
The Korena take
A black Ratio machine-head set for right-handed four-string basses with a 2 x 2 configuration. Its calibrated, string-specific gear ratios are designed to make each string react consistently to a tuning adjustment; the listed Ratio system describes one turn as one tone. The design uses double-envelope gearing and hardened steel gears to achieve its higher ratios.
Strong match
Who this is for
- Replacing tuners on a right-handed four-string bass with a black 2 x 2 machine-head layout.
- Bass setups needing string-position-specific Ratio gearing and Y-style buttons.
Consider the trade-offs
When to look elsewhere
- Bass guitars without a right-handed 2 x 2 machine-head configuration.
- Headstocks that do not accommodate the required 14 mm peg holes.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
35/64 inch (14 mm) required peg holes
Check the headstock's peg-hole diameter before installation.
Detail 03
7.44 oz (212 g) set weight
This is the listed combined weight of the four machine heads.
Final check
Know before you order
- 01Verify right-handed orientation, a four-string bass, 2 x 2 configuration, and 14 mm peg holes.
- 02Confirm the 13.9 mm string-post diameter and 26.1 mm distance to the string hole.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What color is this machine-head set?
Black.
02How many machine heads are in the set?
Four, for a four-string bass.
03What is the listed tuning relationship?
The gear-ratio specification describes one turn as one tone.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsPlayability
- String Post Diameter
- 0.547 inch (13.9mm)
- String Post Length to String Hole
- 1.030 inch (26.1mm)
1 detailsBody & build
- Color
- Black
3 detailsSize & weight
- Peg Holes Diameter Required
- 35/64 inch (14mm)
- Weight per Single Machine Head
- 1.86oz (53g)
- Weight per Set of Four
- 7.44oz (212g)
1 detailsOther
- Gear Ratio
- unique for each string position - one turn-one tone
