Amazon.com: HERTZ Dieci Series DBX-303 12" (300mm) 4-Ohm Sub Enclosure, 250 wRMS : Electronics
Amazon.com: Sennheiser AMBEO Subwoofer for TV and Music with Immersive 3D Surround Sound a Thundering Deep Bass Down to 27 Hz - 8'' Woofer with 350W Class D Amplifier - Black : Electronics