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Graph Tech PRL-9721-B7 Ratio Electric 7-In-Line Locking Tuned Machine Heads - Black Demo

Tuners, 7 in Line with 2-pin Casing, Locking Mechanism, and Ratio Technology for Staggered Posts - Black
Write review Item ID: PRL-9721-B7d2

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Graph Tech PRL-9721-B7 Ratio Electric 7-In-Line Locking Tuned Machine Heads - Black
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Faster and More Accurate Tuning

Graph Tech's Ratio Locking Tuned Machine Heads offer a revolutionary new experience in ensuring your guitar is tuned more quickly and accurately than conventional tuner designs. Each tuner in the set boasts a custom gear ratio that makes each machine head react the same — roughly one full turn per whole tone. Because each string reacts the same, not only is tuning a more pleasant experience, but nailing alternate tunings is a much faster process. Graph Tech's mission statement is, "To Improve Your Playing Experience." They've nailed it with the Ratio Locking Tuned Machine Heads.

Graph Tech's Ratio technology

Though it's a simple idea, Graph Tech's Ratio technology completely changes the way you tune your guitar. All strings are outfitted with gear ratios that ensure you attain the same response from your wound low E string as you do your unwound high E. No matter what string you are tuning, you'll notice that one full turn of the tuner equates to roughly one whole tone pitch change. The Ratio technology makes nailing your pitch much easier and faster. And you'll love how fast it is to get to Drop D and other alternate tunings.

Easy installation

One of the greatest benefits of the Ratio Locking Tuned Machine Head system is that they install onto most guitar headstocks and are completely reversible. Graph Tech's standard InvisoMatch mounting plates ship with the tuners. The machine heads mount directly to those plates and aren't screwed into your instrument. As their name would suggest, the InvisoMatch mounting plates are completely hidden by the Ratio Locking Tuned Machine Heads and offer a sleek, low-profile look.

Graph Tech

Graph Tech has made it their personal mission to supply the products that will make your instrument play better, sound better, and perform better. From the company's popular String Saver saddles to their TUSQ string nuts that can be found on countless manufacturers' guitars, the company's products are a mainstay in the guitar and bass industry. Just about every player at Sweetwater owns something created by Graph Tech, because — like their mission statement demands — they never fail to improve our playing experience.

Graph Tech Ratio Locking Tuned Machine Heads Features:

  • Tuner machine heads that make tuning easier and faster
  • Each tuner reacts the same to the same amount of force
  • Mini Contemporary design for a modern look
  • 1 turn is approximately 1 whole tone
  • InvisoMatch mounting plates allow quick mounting with no extra screw holes

What is Demo Gear?

At Sweetwater, we're so picky that what we call a "demo" is actually better than what most music retailers sell as "new" gear! Our gear hasn't endured hundreds of people a week plunking away at all the keyboards, fumbling through Stairway to Heaven on every guitar or playing with every fader and knob on a mixer or control surface.

What demo means to us is that we've had it out of the box, or maybe it was in a customer's hands for a few days and isn't "factory fresh" as a result. Every demo item we sell has Sweetwater's 2-year Total Confidence Coverage™ warranty, and has been tested and verified up to "new" specs by our factory-authorized technicians to make sure it's in perfect working order before we ship it to you.

When you buy a Demo item at Sweetwater, you get:
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Warranty Info

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Tech Specs

  • Intended Instrument: 7-string Guitar
  • Configuration: 7-Inline
  • Finish: Black
  • Locking: Yes
  • Gear Ratio: 48:1, 39:1, 24:1, 20:1, 35:1, 20:1, 12:1
  • Peg Diameter: 0.234" (peg), 0.385" (9.7mm peg hole)
  • Manufacturer Part Number: PRL-9721-B7

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Customer Reviews

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Rated 2/5

Careful ordering these

I ordered a set of these for my 7 string with inline tuning machines. What I got was a mixed up batch of tuning machines that were too short to fit and they were all different lengths. If your headstock is 1/2" thick these will not fit.I was told what they sent was for a staggered headstock and that I would get the correct replacement set sent to me. It doesn't seem like they actually have any tuning machines for an inline 7 because all I got was a refund with no explanation until after I asked, 12 days later. At least I got a refund but no inline 7 tuning machines seem to be on the radar.
Music background: Little of everything
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