Clark JM Jazz Mandolin
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"Good improvisation communicates harmonic progression melodically. Effective melodies manipulate harmonic content through the use of guide tones and preparatory gravity notes, masterfully woven in systematic tension, release, and transparent harmonic definition."

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April 17, 2012 | D string core issue re-emerges

We mentioned in an article three years ago some problems we had with the D string cores of the JM11 flatwound mandolin strings we've offered through the website for quite some time now (see JM11 String Consumer Alert). Despite a very clean record with over 800 sets of strings since, the problem with the handmade string has intermittently re-emerged. We've had a handful of such reports the last couple months and in the pursuit of maximum quality control, we're publicly registering the concern.

JM11_D_loops2-thumb.jpgWhat is happening is in manufacturing, some of these were wound imperfectly at the loop, ultimately affecting the string's core and making it impossible to intonate correctly up the fretboard. Unfortunately, the flaw is undetectable to the eye, and only manifests itself when fretting the new string past the 6th and 7th frets. They can almost be a 1/2 step flat up at the 12th fret.

We've enjoyed tremendous success with the JM11 JazzMando flatwound strings made by Labella, having recently expanded to the JD13 mandola version, and last year, the JM10B ball-end electric mandolin. We continue to try to improve the product, including making adjustments to the length of the playing area (between the silk windings) and reinforcing the loop on the .011 gg E string. Of course the Mandola strings were lengthened nearly two inches to accommodate a wider range of scale lengths and tailpieces.

The D-string problem will show immediately once tuned. If you do notice this, let us know. These are still a terrific string and quite popular; we've shipped them though out the US and Canada and to many corners of the globe.. We intend to go the extra mile and work with the manufacturer closely to keep them that way.

Let us know (see contact) when you ordered the strings if you run into this isolated incidence.

Thumbnail image for NewJM11.jpg

Posted by Ted at April 17, 2012 5:51 AM

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