Abstract: The invention relates to a guitar tremolo system, a tremolo unit being received in a recess in the body of the guitar, a base block which has string riders being maintained with provision for horizontal pivoting and balanced by tension springs. Multi-subdivided base blocks (5) are disposed in a vertically adjustable mounting frame (1) having bearings for tremolo pivot pin (2) around which a base block actuator (3) and the various base blocks (5) are mounted for rotation. Also the base blocks (5) are securable at choice to the underside of the actuator (3) and are connected to individually operating tension springs (13).