The woods used in the back and sides (and even in the neck) of a guitar have a significant impact on tone. That's why some players prefer guitars with rosewood, mahogany, maple, koa or other body woods. Each has certain tonal qualities which it imparts to the guitar.

The back and sides of a traditionally designed guitar are caused to vibrate in one of two ways. The illustration below depicts a cutaway view of a guitar which has been sliced transversely between the soundhole and the bridge. We are looking down into the guitar towards the tailblock.


The vibration must either travel from the bridge, through the top, through the sides and finally into the back. (See red arrows)


The vibration must travel from the bridge and top through the air cavity within the guitar before it is transferred to the back and sides. (See green arrows)

This means that the back and sides of a traditionally designed guitar are only receiving "second hand" vibrations from the top.

Now let's slice the guitar straight down the fingerboard to the endpin and look into the body from the side.

If we add a JLD Bridge System to the guitar, the soundpost connects the bridge directly to the tailblock of the instrument. The tailblock is glued directly to the sides and back as well as the top of the guitar.

The JLD Bridge System has now provided a direct conduit for string vibration to flow directly from the bridge and into the body woods of the guitar. The result is to give your guitar more of what it already has. It simply allows the whole body of the guitar to work more efficiently and you can easily feel the difference in how your guitar vibrates all the way to the tip of the headstock. Aside from making the guitar louder and adding sustain, the JLD Bridge System tends to make the guitar a little richer in the midranges - a quality that we seek in older, "seasoned" instruments. Think of it as aging the sound of your guitar about 50 years without adding 50 years of wear and tear.

JLD Guitar Research & Development
PO Box 5764
Roswell, NM

- Don Kendall