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3+3 Ratio Acoustic Open Back Tuners (PRN-3411, Select Finish)

3+3 Ratio Acoustic Open Back Tuners (PRN-3411, Select Finish)

PRN-3411-N0

702725245826

Regular price $178.19 USD
Regular price Sale price $178.19 USD
Sale Sold out
Shipped within 1-2 business days.
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-3411 is a right-handed set of open-back RATIO® Calibrated Machine Heads for acoustic guitars that use 3+3 side tuners.

It has an intricate skeletonized button and finish selection.

 

3+3 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: 0.346" (8.8mm)
String post diameter: 0.236" (6mm)
String post length to string hole: 0.827” (21mm)
Weight per single machine head: 0.055lbs (25g)
Weight per set of six: 0.331lbs (150g)
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings

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5.0
Rated 5.0 out of 5 stars
Based on 320 reviews
Total 5 star reviews: 306 Total 4 star reviews: 12 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 0
99%would recommend these products
Slide 1 selected
320 reviews
  • TR
    Tyler R.
    Verified Buyer
    Reviewing
    3+3 Ratio Acoustic Guitar Machine Heads Gold Finish. "45 Degree mounting screw" (GT-118-D0)
    I recommend this product
    Rated 5 out of 5 stars
    Yesterday
    Replaced on a Simon and Patrick Mahogany pro

    Drop in fit. Holds tune way better and allows for quicker more precise tuning.

    Very happy.

  • MB
    Michael B.
    Verified Buyer
    Reviewing
    7 STRINGS: 7-in-line Ratio Lefty Electric Locking Machine Heads (PRL-8721-Lx7, Select Finish)
    I recommend this product
    Rated 5 out of 5 stars
    5 days ago
    The best

    The best tuning machines on the market.

  • JL
    jason l.
    Verified Buyer
    Reviewing
    6-In-Line Ratio Electric Locking Machine Heads Staggered Posts (PRL-9721, 9731, Select Finish and Button Style)
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    ratio tuners

    this is a game changer..best tuners I've used

    Graph Tech Guitar Labs Ltd.
    1 week ago

    Thanks Jason, what guitar did you put them on? Dave D

  • MR
    Matt R.
    Verified Buyer
    Reviewing
    3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    Great solution for my new PRS SE NF3

    I purchased a PRS SE NF3 a couple weeks ago. It is a great guitar, but wanted a locking tuner upgrade. I was originally nervous about the price combined with the "universal fit" thing. I took a chance and ordered these and they have been awesome. The universal plates fit great, although I did have to put in the plates for 3 and 4 together as they are butted up to one another. I was able to use the same screws, but new ones were also provided. I am attaching a photo.

    Regarding the "Ratio" feature, it is a game changer. I never expected it to feel different, more accurate, from other tuning heads. But these being geared to each string's thickness/tension is really effective.

    If you're on the fence, I hope this helps. This is a unique product with features I would love to see become more standard from premium guitar companies. I am not considering upgrading my Telecaster to Ratio tuners.

    Graph Tech Guitar Labs Ltd.
    1 week ago

    Thanks for the great review Matt. Some models by ESP (Bass), Schecter, Maton, Martin, and the Godin Connaisseur Acoustics are coming with RATIO... it's great to see. (and play!

  • MT
    Mark T.
    Verified Buyer
    Reviewing
    4+2 Ratio Electric Locking Machine Heads Mini Contemporary Button (PRL-8421, Select Finish)
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    Worth the $$$

    I’m glad I threw frugality to the wind and bought these tuners. They really are a worthwhile upgrade. EBMM guitars are very stable tuning wise, but the Ratio heads make getting there so much easier!

    Graph Tech Guitar Labs Ltd.
    1 week ago

    Well said Mark! Dave D