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
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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.
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.
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: 0.056lbs (25.5g)
Weight per set of six: 0.338lbs (153g)
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings
Invisomatch Mounting Plates
InvisoMatch Mounting Plates for RATIO Tuned Machine Heads are the easiest approach to installing Ratio Tuned Machine Heads on your guitar.
Simply select the installation plate design that matches the screw/pin hole location of your factory installed machine heads.
You’ll be up and running within minutes, perfectly installed and aligned. Stay classy you axe master.
For stunning accuracy and response... upgrade to Ratio Machine Heads with it's patented Multi-Geared Tuning Technology.
The new standard in tuning.
NO DRILLING, PERFECT ALIGNMENT, FAST INSTALLATION
With InvisoMatch mounting plates you will reduce the time to install RATIO machine heads to well under 15 minutes.
The alignment of the machine heads is perfect, no holes to drill or fill, ideal for vintage instruments.
Four sets of brushed aluminum InvisoMatch mounting plates come free with every set of Ratio Tuners.
Premium finishes including chrome, nickel, black and gold are available for order.
“After reading some reviews and seeing the ads, I decided to try a set of Graph Tech’s ratio tuners on my American standard Strat. The tuners arrived and I was very pleased with the quality and finish. Installing the tuners was a breeze using the included InvisoMatch plates — no need to drill any holes in my beloved Strat and the performance of these tuners is outstanding!"
"Tuning becomes incredibly easy and holds tune even when using the tremolo bar. I would highly recommend these as a great upgrade to any guitar and will be telling my customers what a great addition they would be for very stable and easy tuning.
Thanks, Graph Tech for a great product.!
Jay Langan / Magdon Music / guitar sales/ guitar tech
Click a picture to open a PDF file with the dimensions.
- JHJack H.Verified BuyerReviewing3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)I recommend this productRated 5 out of 5 starsYesterdayQuality!
I have the Ratio Machine Heads on all my guitars, some locking and some non-locking. Electric or acoustic, they work great, the adapters (when needed) fit right, after years not one failure of any kind. A quality product that works as advertised, maybe better. Love them!
- RSRussell S.Verified BuyerReviewing3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)I recommend this productRated 5 out of 5 stars2 days agoBest - period.
So great! Nothing comes close.
- JJleleVerified ReviewerReviewing3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)I recommend this productRated 5 out of 5 stars1 week agoPRL-8311-CO sur Yamaha Revstar RSS02T
S'adapte à la perfection sur une Yamaha Revstar RSS02T.
Le montage est très propre, aucun perçage nécessaire, la plaque d'adaptation est vraiment une excellente idée. Accordage très précis.
TOUT EST PARFAIT
- DNDennis N.Verified BuyerReviewing6-In-Line Ratio Electric Locking Machine Heads Staggered Posts (PRL-9721, 9731, Select Finish and Button Style)I recommend this productRated 5 out of 5 stars1 week agoNot installed
Part of a project build. Not installed at this time. They came highly recommended.
- DTDan T.Verified BuyerReviewing3+3 Ratio Acoustic Locking Guitar Machine Heads (PRL-8411, PRL-8441, Select Finish and Button Style)I recommend this productRated 5 out of 5 stars2 weeks agoWorks perfectly on my Taylor GS Mini E-Koa
I know a lot of people think it is overkill to put locking tuners on an acoustic. There is no tremolo bar and not a lot of big string bends, but the stability and the ease of string change make it worth it in my opinion. I installed the PRL-8411's on my new Taylor GS Mini e-Koa. The machine heads matched perfectly with the two original holes on the back of the head. No need for any InvisoMatch plates. The individual ratios for each string makes tuning much quicker and locks in accurately. Highly recommended.