ASB4128 is a medium power subwoofer system comprised of two 460 mm (18 in) low frequency drivers in a front-loaded, vented configuration. The deep, rectangular cabinet allows for extended low frequency bandwidth with minimum frontal profile. The enclosure is fitted with M10 threaded suspension points. Pre-engineered array bracketry is available. ASB4128 is part of JBLs AE Application Engineered Series, a versatile family of loudspeakers for a wide variety of applications.