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6-In-Line Ratio Lefty Electric Locking Machine Heads (PRL-8721-L, PRL-8731-L, Select Finish and Button Style)

6-In-Line Ratio Lefty Electric Locking Machine Heads (PRL-8721-L, PRL-8731-L, Select Finish and Button Style)

PRL-8721-LG0

702725245468

Regular price $178.19 USD
Regular price Sale price $178.19 USD
Sale Sold out
Select Finish
Select Button Style

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, 35:1, 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.

RATIO Machine Heads explanation video

 

The PRL-8721 and PRL-8731 are a left-handed sets of Locking RATIO® Calibrated Machine Heads for electric guitar that use 6-in-line tuners.

It has a two pin casing that can be used as is, or with our Patented InvisoMatch Mounting Plates [opens in new tab].

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

 

6-in-line tuners set  Ratio Tuned Machine Heads: The New Standard In Tuning Technology

 

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: 0.083lbs (38g)
Weight per set of six: 0.496lbs (225g)
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings
Includes complimentary 4 sets of aluminum mounting plates

Staggered Ratio Measurements.pdfRatio Installation Guide.pdfRatio Installation Guide Video
Moss Hart

Reviewed in the United States on February 15, 2020

Amazon Verified Purchase

 

UPGRADE TO PREMIUM PLATED INVISOMATCH View full details
4.8
Rated 4.8 stars
Based on 5 reviews
Total 5 star reviews: 4 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
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5 reviews
  • NB
    NOAH B.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    2 weeks ago
    Great tuners

    Recommend highly

  • JA
    Jean A.
    Verified Buyer
    I recommend this product
    Rated 4 stars
    3 weeks ago
    nice product.

    easy to instal !

  • DG
    Daniel G.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    4 weeks ago
    Ibanez Reverse Headstock

    Direct replacement on my reverse headstock Ibanez. Easy to install and work as advertised. Love how quick and easy string changes are now. I also replaced the stock nut with a Tusq XL at the same time. Excellent products!

  • AM
    Ann Marie D.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    5 months ago
    Warmoth Reverse Warhead Application

    Well constructed, easy to install, work exactly as advertised. Tuning is easy and fast. Used on right handed, reverse headstock, Warmoth Warhead. Used with string tree (Black finish, contemporary).

  • AP
    Alexander P.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    6 months ago
    This might get expensive!

    After fitting these to my Ibanez I immediately ordered a set for my Les Paul. They were so easy to fit and made such a difference. I can see me installing them on my other guitars too.

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