Abstract: A stringed musical instrument having a body which includes a top, back and a neck, with a varied number of strings. The top is a flat sound board assembly, with a sound hole, which has a bridge and, on the underside, a bracing system mounted to the board and directly connected by fasteners through the board to the bridge for transmitting string vibrations via the bridge fasteners and braces on the board to the body interior. The back is a molded unit specifically shaped to increase the volume of sound produced by focalizing and directing it through the sound hole in the board. The combination of the direct fastener connection, bracing system and curved back for focussing the vibrations increases the sound volume and quality.