High Impact Without Wires. The JBL SW10 powered wireless subwoofer adds impactful, deep bass to the JBL LINK BAR to create the ultimate immersive audio experience. Featuring a 10" woofer, tuned bass reflex enclosure and onboard 300-watt amplifier, the JBL SW10 delivers rich and thrilling bass without the hassle of wires. In order to provide flexible placement options, JBL has incorporated a downward firing design architecture making room location far less critical. The SW10 is the perfect add-on when you are looking for real JBL pro bass.