- Flattens Bellied/Warped/Bowed Guitar Soundboards
- Increases Volume and Sustain, Improves String Balance
- Easy Installation, No Drilling Required
- For 6-string and 12-string Guitars
- Made in USA
A unique solution to a common bridge problem, this spruce device attaches beneath a guitar bridge. An adjustable spruce "pressure post" rests against the tailblock, providing leverage to flatten the soundboard. This results in increased playability and better action, increased volume and sustain, and improved string balance. The overall result is an amazing improvement in the richness and depth of the sound on your guitar.
Note! You do not have to have a bowed soundboard to use this product! Using it on a normal guitar will provide increased volume and sustain, and provide a richer, more balanced tone overall. Installing this product will also prevent your soundboard from bowing in the future!
For 12-string guitars, there may not be enough room on the bridge for the mounting screw. We recommend using the Brass Pin Mount model for most 12-string guitars, which mounts using brass pins instead of your existing string pegs.
Note: These instructions are for the Brass Pin Mount model. The Screw Mount model uses a small screw that attaches the JLD Bridge Doctor to your bridge, otherwise the instructions are the same
Guitar strings constantly pull up and forward with a force of approximately 250 lbs., ultimately causing the top on your guitar to warp. JLD Guitar Research and Development, Inc. has patented a simple way to remedy bowed tops. The JLD Bridge System installs easily through the soundhole in minutes and requires no modification to the instrument.
The image above shows the effects of string tension on a typical guitar. There is a pronounced bow behind the bridge and a dip in front of it. The saddle has been filed down to keep the action playable as the top has come up. Because the bridge pin holes are almost even with the top of the saddle, the strings don't exert much downward force on the top. This guitar is hard to play and has a weak, thin tone.
Above is the same guitar with a JLD Bridge System being installed. The bridge pins have been replaced with the included brass pins. The JLD Bridge System has been inserted through the soundhole and is held in place by one of the new bridge pins which has been threaded into the top of the Bridge System. A small locknut keeps the additional pins in place. Strings now pass through holes in the tops of the brass pins instead of being inserted into the bridge pin holes.
Here, the JLD Bridge System has been adjusted to counteract the pull of the strings and the warpage of the top. The top is permanently flat and a playable action has been restored. The strings exert proper downward pressure on the saddle - enabling them to transmit more vibration to the instrument. The Bridge System is also acting as a soundpost - transferring string vibration to the body woods directly from the bridge. The guitar is completely unmodified and is not only easy to play, it will now have more volume and sustain and a richer tone than it ever had before.
The JLD Bridge Doctor system has been scientifically proven to improve the sound of your guitar, whether it is a new guitar or an older, more seasoned instrument. The benefits provided by this patented technology are so substantial that Breedlove Guitars and Trinity River Guitars now install a JLD Bridge Doctor on every new guitar that they make!