Author Archive | John Wallace

Screw-less grain matched cavity covers

Screw-less Grain Matched Cavity Cover Demo This is a demo of our screw-less electronics cavity covers. There are thin but powerful neodymium magnets imbedded inside the cover plate. We've engineered it so that casual bumps with medal objects like your belt buckle don't accedentally dislodge it. It can only be removed with the specially built cube tool (included with [...]
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New Website 2.0 coming soon!

Our new JWG website is coming soon! I just wanted to take a minute to let our visitors know that we've been hard at work developing a new website for the last few months.  The new site will show off our products with a little more depth and we'll be adding some video demo's of our [...]
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1968 Martin D-28

1968 Martin D-28 bridge repair. I don't very often post repairs I do but I thought I'd spotlight of repair I did on a vintage 1968 Martin D-28 acoustic with a cracked bridge. The guitar had had the bridge worked on previously with at least one bridge re-glue being done.  Upon removing the bridge I suspected it [...]
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Custom or off the shelf?

Custom built guitar or off the shelf? So, the question is, custom hand-built or just off-the shelf? This is a veritable debate, and a dilemma every well-established musician faces. But I’m hoping that this article will provide direction to your thoughts and clear up your doubts. You’ll ask, how? Read on... The first thing which [...]
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Magnetic Truss Rod Covers

No Screws? I wanted something a little easier to access and a little more elegant than a conventional screw to secure the truss cover so I started experimenting with rare earth magnets hidden under the truss rod cover. Finding the correct size and strength of magnet took a bit of experimentation in the beginning design stages. If the magnet was too strong the cover would [...]
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We have a new demo video.

We now have our first Dimple demo video on our new youtube channel! Go check it out and please subscribe. Its short demo of the DMP-SN model and was made for us by Matt Vernon of the band Alive & Well. (Thanks Matt). Matt and his band are based out of San Diego and if you get a [...]
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Control Cavities

Shielding control cavities. Radio Frequency (RF) can do nasty things to your sound. radio stations, fluorescent lighting, even cell phones can interfere with your sound signal.  To combat that we shield the electronics with a Faraday Cage. There's two common ways to do this.  With foil (copper or aluminum) or with conductive paint. Here's a quick [...]
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Making a bone nut.

Bone is my first choice of nut material because its dense, long lasting and beautiful.   The density of bone also contributes to the resonance and sustain of a guitar and that in turn becomes a fractional part of the recipe for superior tone. Here is a short step by step pictorial of how I fabricate my guitar nuts. Here is the [...]
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Black Bone Nuts.

Black bone guitar nuts? I'm a fan of bone nuts and they come standard on most of my builds. While finishing up the building of the first Spalted DMP-SN I determined that a white bone nut would wreck the visual flow between the black ebony fretboard and headstock.  So what do you do when you want a [...]
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Carving Truss Recesses.

I use a few different techniques for adding the truss rod recess cavity into the headstock. As of the writing of this post my favorite technique is to carve it in by hand with a sharp gouge then sand it smooth and dye or spray the inside black. Even though the recess will only be seen by the guitar tech during setups and [...]
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