You can now enjoy professional-quality sound in the home with a precision loudspeaker that offers the dynamics and accuracy that JBL® engineers have produced for musicians and other audio professionals. Powerful yet compact, the 4307 control monitor is a home version of monitor loudspeakers built for professional recording studios, measuring just 21-1/2 inches (545 millimeters) high, 12-7/8 inches (328 millimeters) wide and 11-3/4 inches (300 millimeters) deep. Level attenuators let you tailor the midrange and high-frequency performance to your suit your personal taste.