Yamaha DXS18XLF-D Overview The black Yamaha DXS18XLF-D is a Dante-equipped, powered subwoofer designed for extending the low frequency of full-range speakers and is well suited for use with any of the DZR-series powered loudspeakers. The 1600W Class-D amplifier powers the 18" woofer to provide a frequency range of 30 to 150 Hz (-10 dB) with a maximum SPL of 136 dB. The on..