The 15NDL88 is B&C's best wideband 15" woofer. Smooth response all the way up to 3 kHz(!), shorting ring in the motor, high motor strength relative to moving mass, 98 dB efficiency, 700 watts RMS, 8mm xmax. And arguably a perfect balance of parameters for a high-end, high-output two-way system. Purchased for a project that will have to wait for another day. Two woofers available, both new-in-the-box. Asking 300 each.