PG's Chris Burgess is On Location in Nashville, TN, for Summer NAMM '09 where he visits the GlassTones booth. At first glimpse, these guitars have a shimmering attribute not seen on most guitars -- a highly-tempered silica based compound (e.g., glass) that works as the guitar's fretboard. This patented technology is described to eliminate interference from other inferior materials, such as metal, and purifying the vibration of the string. The resulting sound is clear, pure, and bold with increased sustain. Other appointments of GlassTones guitars include maple necks, Sperzel tuners, various Lindy Fralin pickups and Gotoh bridges.