@ winner, that sounds like a great idea... could you show me a quick example schematic? 4 times the energy would suffice... it would help out a great deal for version 2 of the instrument!!!
@duane :: this is a prototype running on a piano - prototype #2 on Vimeo
here is a picture of the final instrument, and some sound as well...
acoustic recording - http://snd.sc/LGy24i
live through 6 guitar amps, along with some processing, samples etc - http://snd.sc/OLgcQm