Yamaha DXS18XLFW 1600W Powered Subwoofer (White) - 18inThe whtie Yamaha DXS18XLF is a 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 onboard D XSUB LF 96 kHz DSP processor provides total bass management. The Normal mode is ideal for a balanced low frequency