With power handling of 1400W continuous (2800W program) and sensitivity of 103 dB/W/m, the highly efficient WX-218SDF offers exceptional punch, high output, and low distortion. It uses a unique combination of techniques to keep voice coil temperatures low to minimize power compression that causes reduced output at higher volume levels. BCL (Balanced Cone Loading) improves the linearity of the system by balancing the front and rear air loads. The 3rd harmonic distortion at 40V (50% power) averages less than 1.9% over its operating range and the enclosure has strong internal bracing to reduce sound energy losses from enclosure vibration. Four powder-coated steel mounting brackets are included.