Stunning tuning precision on every string!
RATIO® for Bass Machine Heads is an innovative tuning system that enhances efficiency and predictability by eliminating guesswork in tuning. Unlike traditional bass machine heads, which use a uniform gear ratio for all strings—resulting in inconsistent tuning responses due to varying string diameters—RATIO® provides each string with its own specific gear ratio. This ensures that every string reacts uniformly to adjustments, allowing for precise tuning, improved playability, and greater stability during performances.
The fastest, most precise tuning in the universe!
Experience the difference — Try RATIO® Machine Heads for Bass today!
1 Turn = 1 full tone
Higher gear ratios on the thicker core strings and lower gear ratios on the thinner core.
Exclusive double envelope, hardened steel gear for strength and precision on higher gear ratios.
The simple genius of RATIO® multi-geared machine heads RATIO® matches the gear ratio to the core thickness of every string so that every string responds to precise tuning adjustments.
How does it work?
Each string’s core diameter is different, a specific gear ratio for each string was researched and developed to ensure that each string reacted the same to the turn of a machine head.
The result for a 4 string bass is a gear of 48:1, 36:1, 25:1, and 23:1 for the E,A,D, and G string, respectively. This system has created an even tuning experience that assures you that once you know what it feels like to tune one string, you will know what it will feel like to tune the rest of the strings.
The easy-to-install system is available in classic “clover” style buttons or with the more contemporary “Y-key” style buttons. The “Y-key” buttons are available in chrome or black finishes. The Ratio for bass machine heads are also available for 4, 5 and 6 string basses in most headstock configurations.
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Graph Tech has created some of the world's most recognized products and brands in the music industry
The list of industry firsts include the world's first self-lubricating nut in 1983, String Saver Saddles the first saddle to drastically reduce string breakage, TUSQ man-made ivory, and Ratio machine heads.
