"The 3733 uses the 4739 LF for increased low frequency output. The M/HF utilizes Dual Dissimilar Arraying technology to shape the coverage patter for the optimal use. In addition the horn design improves the frequency response and lowers distortion at higher output. The 2415-XP high frequency drivers are JBL’s latest HF compression driver, designed to achieve higher output with lower harmonic distortion."
Manufacturer part number: 3733-M/HF