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RATIO MACHINE HEADS - Bass

Graph Tech's calibrated & synchronized tuning system makes tuning and re-tuning your bass faster and more intuitive. Tuning on the fly has never be easier!. Each string position has  it's own calibrated gear ratio, so every string feels and reacts the same to any tuning adjustment.

One full rotation of any key results in a one full tone pitch change (give or take).  From Low B to C,  on a 6 string, small diameter post, the gear ratio's are 48:1, 36:1, 30:1, 20:1, 18:1 and 16:1.  

In order to achieve the higher gear ratio's, Ratio's are the world's first machine heads using a double envelope gear design with a hardened steel gear. Amazingly smooth and super strong. 

6 products
Bass Ratio 4 String - 2 + 2 Y-Style Button (Please Select Finish) - Graph Tech Guitar Labs Ltd.
Bass Ratio 4 String - 2 + 2 Y-Style Button (Please Select Finish)
Price: $99.99 USD
$99.99 USD
Price: $99.99 USD
$99.99 USD
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Bass Ratio 4 String - 4-in-line Open Back Classic Clover Leaf Button - Chrome - Graph Tech Guitar Labs Ltd.
PRB-4401-C0
Bass Ratio 4 String - 4-in-line Open Back Classic Clover Leaf Butto...
Price: $169.95 USD
$169.95 USD
Price: $169.95 USD
$169.95 USD
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Bass Ratio 6 String 3 + 3- Y-Style Button (Choose Finish) - Graph Tech Guitar Labs Ltd.
Bass Ratio 6 String 3 + 3- Y-Style Button (Choose Finish)
Price: $149.95 USD
$149.95 USD
Price: $149.95 USD
$149.95 USD
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Bass Ratio 4 String - 4-in-line Y-Style Button (Please select finish) - Graph Tech Guitar Labs Ltd.
Bass Ratio 4 String - 4-in-line Y-Style Button (Please select finish)
Price: $99.99 USD
$99.99 USD
Price: $99.99 USD
$99.99 USD
LEARN MORE
Bass Ratio 5 String - 5-in-line Y-Style Button (Choose Finish) - Graph Tech Guitar Labs Ltd.
Bass Ratio 5 String - 5-in-line Y-Style Button (Choose Finish)
Price: $129.95 USD
$129.95 USD
Price: $129.95 USD
$129.95 USD
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Bass Ratio 5 String 4 + 1 Classic Clover Leaf Button - Chrome - Graph Tech Guitar Labs Ltd.
PRB-5411-C0
Bass Ratio 5 String 4 + 1 Classic Clover Leaf Button - Chrome
Price: $199.95 USD
$199.95 USD
Price: $199.95 USD
$199.95 USD
LEARN MORE