To combine the stability and robustness of carbon fiber with the traditional aesthetics of wood, RainSong has developed SFT: Soundboard Fusion Technology. After careful experimentation, we are able to fuse a thin spruce soundboard and a unidirectional pre-impregnated carbon layer in a single molding step. The resulting SFT soundboard is a composite matrix that resonates as a single unit, like a solid wood soundboard. The physical properties of the carbon fiber far exceed those of the thin wood. Hence the SFT soundboard maintains the imperviousness to humidity and temperature of carbon fiber.
An SFT soundboard delivers rich crystalline carbon sound subtly colored by wood.
The RainSong N-JM3100 Jumbo 12-String Acoustic-Electric Guitar combines the large-sized sound chamber with lightweight carbon-fiber/spruce construction to deliver extra-loud and deep tone that superbly counterbalances the extra treble strings. This is a 12-string guitar that is great for strumming and finger style, full of power and delicacy, and ready to hit the road. The RainSong N-JM3100 12-string is able to stay in tune at concert pitch and to withstand temperature and humidity variations; qualities that every seasoned 12-string player has long pined for.