JBL VRX915S 15" Bass Reflex Arrayable Subwoofer, 800W | Full Compass Systems
Amazon.com: JBL Club WS1000 10" Shallow Mount subwoofer w/SSI (Selectable Smart Impedance) Switch from 2 to 4 ohm Bundled with Alphasonik Earbuds : Electronics
JBL VRX918S 18" 800W Line Array Subwoofer | Full Compass Systems