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4 String 4-In-Line Bass Ratio Y-Style Button (PRB-4400, Select Finish)

4 String 4-In-Line Bass Ratio Y-Style Button (PRB-4400, Select Finish)

PRB-4400-C0

702725245185

Regular price $114.99 USD
Regular price Sale price $114.99 USD
Sale Sold out
Select Finish
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RATIOĀ® patented gear technology
RATIOĀ® - Calibrated Machine Heads incorporate different string gauges into the tuning equation.

From Low E to G - 36:1, 30:1, 20:1, 18:1.

We balanced the gear ratios to each string simplifying the tuning process.

With RATIOĀ®, a half-turn is a semi-tone!

Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string.Ā 

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Bass Ratio animation

The PRB-4400 is a right-handed set of RATIOĀ® Calibrated Machine Heads for BASS that use a 4-in-line configuration.

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In order to achieve the higher gear ratio's,Ā Ratio's are the world'sĀ first machine heads using a double envelope gear design with a hardened steel gear. Amazingly smooth and super strong.

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Headstock Configuration 4-in-line Ā Ratio Tuned Machine Heads: The New Standard In Tuning Technology

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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: 1.030ā€ (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)
Includes 4 machine heads, mounting screws, and bushings

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Staggered Ratio Measurements.pdfĀ Ratio Installation Guide.pdfĀ Ratio Installation Guide Video

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Our Bass Ratio rated 5 stars on Sweetwater.

Sweetwater Rating 5.0

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UPGRADE TO PREMIUM PLATED INVISOMATCH View full details
5.0
Rated 5.0 stars
Based on 1 review
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
1 review
  • JI
    John I.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    7 months ago
    High quality product

    Refurbishing an old bass and these worked great!

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