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True Pitch and Solid Tone: Gibson’s Tune-O-Matic Bridge

Dave Hunter
|
10.10.2007

Tune-o-matic

We might take it for granted today, but the facility to individually adjust an independent bridge saddle for each string was an impressive development when it first hit the guitar world more than 50 years ago. Prior to the arrival of the Tune-o-matic bridge in 1954, Gibson electrics carried either a floating bridge with compensated one-piece rosewood or ebony saddle, a rudimentary trapeze tailpiece with integral wrapover bridge bar, or a stud-mounted wraparound bridge, each of which offered only the crudest global intonation and height adjustment for the strings. When the Tune-o-matic bridge, also known as the ABR-1, first appeared—initially on the Les Paul Custom and then on the Goldtop Les Paul “Standard” the following year—it was a true revelation in intonation, and set a standard for simplicity and functionality that has never been bettered.

The Tune-o-matic was designed by Gibson president Ted McCarty himself, and was initially part of what made the Les Paul Custom “custom.” But it was too important a piece of hardware to be limited to use only on “upgraded” instruments. Partnered with a separate “stud” or “stopbar” tailpiece, which was essentially a modified version of the wraparound bridge, the Tune-o-matic provided both a firm seating for the strings at the body-end termination point of their speaking length, and a facility for adjusting the individual length of each via a sliding steel saddle and adjustment screw. Finally a player could fine-tune intonation for themselves, in a matter of minutes, and easily adjust it again when atmospheric conditions required periodic alterations. This solid, well-seated piece of hardware also yields great coupling between string and body, which results in great tone and excellent sustain. It also provided quick and easy adjustment of the overall string height via thumb-wheels threaded over the mounting bolt at either end of the bridge.

Gibson has also employed the Tune-o-matic bridge on a number of archtop electrics over the years, where it is partnered either with a trapeze tailpiece on hollowbody models such as the ES-175, or a stop-bar tailpiece on semi-acoustic models with solid center blocks, such as the ES-335. Some of Gibson’s more basic bridges still have their fans, of course—the wraparound bridge in particular being beloved of many players, as found on Les Paul and SG Specials and Juniors and the 1954 Les Paul reissue—but the Tune-o-matic bridge remains the epitome of form and function in electric guitar bridge design, and is one of the most revered and copied pieces of guitar hardware ever developed.



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