Denon HEOS Subwoofer Wireless subwoofer for compatible HEOS speakers and components at Crutchfield
Amazon.com: Denon Home Subwoofer with HEOS Built-In, Deep, Powerful Bass, 8" Bass-Reflex Woofer, Pair with Denon Home Sound Bar 550, and Denon Home 150/250/350 Speakers or HEOS Speakers, Easy Installation : Electronics