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3+3 Ratio Acoustic Locking Guitar Machine Heads (PRL-8411, PRL-8441, Select Finish and Button Style)

3+3 Ratio Acoustic Locking Guitar Machine Heads (PRL-8411, PRL-8441, Select Finish and Button Style)

PRL-8411-C0

702725245208

Regular price $160.94 USD
Regular price Sale price $160.94 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, 14:1, 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 PRN-8411 and PRN-8441 are right-handed sets of Locking RATIO® Calibrated Machine Heads for acoustic guitar that use 3 per side 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.

 

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

UPGRADE TO PREMIUM PLATED INVISOMATCH View full details
5.0
Rated 5.0 out of 5 stars
Based on 4 reviews
Total 5 star reviews: 4 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
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4 reviews
  • AD
    Aaron D.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    5 days ago
    Better than stock

    I contacted Graph Tech with recommendations on locking machine heads for my Martin acoustic. I went with the advised tuners and plates. The products are well made and the installation was easy. The action was very high afterwards, so my local luthier worked his magic and my Martin plays better than it ever had. I’m completely satisfied.

  • RL
    Randall L.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    4 weeks ago
    Retrofit

    Purchased these for my Ovation which, came with the most frustrating tuners I've ever delt with. The Graphtech tuning machines while expensive, are top shelf. Simple to install and are a huge improvement over the stock tuners. I would purchase these again.

  • TB
    Tim B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    4 months ago
    Great Product

    Smooth

  • AT
    Adam T.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    8 months ago
    Great addition to my guitar

    These Machine Heads are easy to use and the locking feature makes restringing and tuning much quicker/easier. They look great too.

    Service was fast and great as always. Love Graphtech as a company and all of their products that I've tried have been top tier.

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