The JBL 15" AC599 2-Way Speaker with 90 x 90 Horn is comprised of one 384 mm (15 in) low frequency driver and one 25 mm (1 in) exit/35 mm (1.5 in) voice-coil compression driver. The horn provides 90 by 90 coverage in vertical and horizontal orientation. High-slope passive crossovers minimize band overlap and well-controlled offaxis response. The cabinet is fitted with M10 threaded suspension points. Four threaded inserts located on back of the enclosure allow attachment of an MultiMount or similar type mounting.