The HDL 36-AS is the ideal flyable bass complement for the HDL 28-A array system. It features one 4.0” voice coil, 15” neodymium woofer to handle 135 dB SPL Max from 40 Hz to 140 Hz with the maximum linearity and low distortion. The built-in 3200 watts class-D amplifier delivers excellent playback clarity and up to 135 decibels SPL max. Due to its compatibility with RDNet - remote monitoring and control, the HDL 36-AS is part of the professional HDL System.