Posted by yellowdog on Friday, February 9, 2018
Yesterday, I announced an exciting new product from Geiger Acoustic Devices named the "Butterfly Dream Sustaining Amplifier For Banjos, Guitars and Mandolins", Like our other amplifiers it is a mechanical and movable temporary attachment and is powered by the instrument's sound surface waves. But unlike our other products, in addition to improving the sound of my Gibson Mastertone tenor banjo it also did the same for my round hole acoustic guitar and F-hole mandolin. -(Simply by taping it to any of those instruments!)
I've posted complete details about it on my website including two free downloadable documents - a "Theory and Instructions" document (a two two-page narrative), and a one-page fully annotated drawing which clearly shows how it works. You will probably find those downloads very interesting and easy to understand. The "Theory and Instructions" document was updated on February 12, 2018, so if you downloaded it before then please download the revised document which is Rev 4, a PDF file.
I originally called this amplifier a "timbre amplifier" but changed the name to a "sustaining amplifier" because "sustain" is its most noticeable feature. I also added the word, "Dream" in the title because I've always dreamed of owning a banjo with a great banjo sound and with the sustain of a guitar. I wrote yesterday that to me this amplifier is like a "Dream come true" because it does just that for my banjo and should for yours.
Great sustain isn't an advantage for all types of music, of course, and the sustain of this amplifier may be too much for playing fast Bluegrass music. (Because the first note played may still be sounding when the second note is played.) But it's outstanding volume should be a big plus for playing Bluegrass as well as any style.
The outstanding sustain and volume are the result of both the materials and design. Materials include brass foil glued to walnut (or maple if you wish) veneer for a great banjo sound, and its design is based on the surface wave-sustaining nature of two contiguous octagons joined along one edge which provides an amplifying, continuous "figure-8-like" route to sound surface waves. The device uses four of these contiguous octagon shapes, two of which are bent in half which makes it look like a butterfly "flying" (hanging) in the banjo's sound chamber by its sound surface wave input tape.
I'll be posting an ad for it on BHO soon but you can order one now from our website.
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