Electro-Voice EVH-1152D/43-WHT 2 Way Premium Arrayable Point-Source Coaxial Horn Loaded Loudspeaker (White)The EVH 1152D 43 utilizes the DH7N, a high output 3 titanium compression driver, coupled to a Constant Directivity 40 x 30 waveguide. The SMX2151 15 woofer was developed using FEA optimization for motor, suspension, and electrical design to ensure very low distortion, high efficiency, and maximum intelligibility at high SPL. The crossover uses steep, 24 dB per octave slopes with equalization for very smooth response in the vocal range, linear off axis