The amount of string pressure on an acoustic steel string guitar is in the region of 170lb or 77kg for a 6 string guitar. For a 12 string guitar in standard tuning, it can be in excess of 250lb or 113kg.

Such a large amount of lateral pressure is a lot for a guitar to withstand. This often has the effect, over time, of lifting the soundboard into a bulge or 'belly' around the bridge area which in turn causes the string action to raise adversely affecting the playability of the guitar.

A lot of bellied acoustics have the saddle shaved down in order to make the action playable again as this is a common and effective way of lowering action. This, however, reduces the break angle of the strings over the saddle which, in turn, reduces the amount of string vibration generated into the soundboard. More importantly this does not fix the bellying or stop it from continuing.

BridgeMagic© brings the guitar back into shape allowing for the best possible saddle height, break angle, and therefore direction of the string vibration into the sound board.