GRAPH TECH BRANDS
For 37 years Graph Tech has created some of the worlds most recognized brands in the music industry by innovating and delivering products that accomplish what they promise. Below you will see the Graph Tech family of brands. Click on a logo to learn more and see the products we produce.
RATIO Machine Heads are a high performance transmission for your guitar. The core tension of every string is different, each requiring a unique gear ratio to deliver tuning perfection. RATIO’s
patented gear technology delivers premium tuning performance every time by giving each string its own specific tuning gear.
THE SIMPLE GENIUS BEHIND RATIO® SYNCHRONIZED MACHINE HEADS
We've tuned the gear ratios to each string position so that every string responds the same to any tuning adjustment. You get fine tuning on the thicker core strings and coarser tuning on the thinner core; anywhere from 12:1 to 39:1 gear ratio. With Ratio®, one turn is about one tone change on all strings, making tuning, retuning and open tunings easier, quicker and more intuitive.

The fastest, most precise tuning in the universe!

EASY TO INSTALL
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, then follow the three step process described below. You’ll be up and running within minutes, perfectly installed and aligned. Stay classy you axe master.
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PREDICTABLE, PRECISE TUNING, RETUNING AND OPEN TUNINGS.
Ratio® tuning feels natural. You don't have to think about which string you are tuning because they all feel and respond the same. No more overshooting the Low E or plain G. No more twisting away on the High E or D string. Open tunings have never been easier. String gauges such as light top, heavy bottom are no problem with Ratio®; they still do the same precision tuning..
NOT JUST ANOTHER MACHINE HEAD.
Ratio is more than just another entry into the machine head market. Instead, Ratio has reinvented how machine heads function with the musician.
FOR MORE ABOUT RATIO® SYNCHRONIZED MACHINE HEADS FOR GUITAR CLICK HERE
FOR MORE ABOUT RATIO® SYNCHRONIZED MACHINE HEADS FOR BASS CLICK HERE
FOR MORE ABOUT RATIO® TUNE-A-LELE MACHINE HEADS FOR UKE CLICK HERE
ONCE YOU EXPERIENCE OUR RATIO TUNED MACHINE HEADS, YOU WON’T GO BACK TO REGULAR MACHINE HEADS
“They are on my personal guitar.
They’re great, I can’t believe no one had
come up with this idea until now! (Ratio)
Makes tuning effortless and easier!”
JAMES VALENTINE
MAROON 5
“Having been a user of Graph tech products for
years, I’m blown away by the Ratio Tuning Machines. They’ve outdone themselves this time and these things are going on EVERY guitar I own.”
JASEN RAUCH
BREAKIN BENJAMIN
“I didn’t know tuning my bass
could be a recognizably better
experience. I love the Ratios,
and they’re so smooth!”
NICOLE ROW
PANIC! AT THE DISCO
"I am pleased to announce that my guitars are now have Ratio locking Tuners. The Ratio locking Tuners are fantastic, and being out of tune is a thing of the past thanks to these Tuners.
MICK BOX
URIAH HEEP
RATIO - Machine Heads
PLAY THE IMPOSSIBLE!
Be the band with the ghost modular pickup system. Get studio quality acoustic tone or MIDI compatible output at the flick of a switch. Finally an affordable, modular pickup system in an easy to install package.
ACOUSTI-PHONIC
Imagine a rich, authentic acoustic guitar tone coming from your electric guitar - at the flick of the switch! Replace your current saddles with Graph Tech's ghost modular pickups and one of our Acousti-Phonic preamp and you'll have instant access to true, acoustic tone from your electric guitar or bass, without altering your electric pickups. With the ghost Acousti-Phonic system you can play one guitar! It can be electric AND acoustic, separately, or blended together for an infinite range of new and exciting sounds.
HEXPANDER
The ghost Hexpander MIDI interface system adds MIDI capability to almost any guitar or bass. Plug your guitar into pitch-to-MIDI converters by Roland or Axon and enter the MIDI sound universe. The Hexpander MIDI interface provides responsive and accurate tracking unequaled be any other system on the market today. Check out how affordable and easy it can be to make MIDI part of your music making.
ORDER NOW
THE GHOST MODULAR PICKUP SYSTEM
The principle behind the GHOST Modular Pickup System is simple but the results are truly amazing.
By strategically implanting a custom engineered piezo
pickup inside a set of Graph Tech saddles then processing the signal through the Acousti-Phonic Intelligent Pre-amp, the natural acoustics of your guitar are captured.
Feedback and mic placement problems associated with an amplified acoustic guitar are eliminated, and you can play as hard as you like without
overload.
This guide describes installing the GHOST Modular Pickup System and the GHOST Acousti-Phonic Intelligent Pre-amp in your guitar.
Note:
Some instruments may require modifications to accommodate piezo wires.
See our complete installation manual for more specifics or contact us directly (support@graphtech.com).