The SB730 is designed as a companion to KF730 Line Arrays. Used in arrays of two or more, the SB730s couple to extend the low frequency response. The unique enclosure shape both enhances the acoustical performance and serves to provide a solid base for a ground-stacked KF730 array. The SB730 enclosure is 1.5 times the height of a KF730, which allows attractive KF730/SB730 arrays to be assembled in a 3:2 ratio. The "clam shell" arrangment of its two, advanced design, 12 inch woofers provides tighter driver coupling to increase output and maximize LF "punch". A massive port radiates the considerable energy needed at the enclosure's tuning frequency to complement the KF730s output at other frequencies.