JBL Synthesis loudspeakers are designed to grab ahold of your emotions and not let go. The SSW-4 in-wall subwoofer delivers dynamic bass and lifelike realism to home cinema and concealed music systems, courtesy of dual 8” (200mm) Klippel-optimized, metal cone woofers. The self-contained module with integrated back box makes it easy to retrofit existing installations. The SSW-4 is designed to fit standard 2 x 4 stud frame construction, and the clean industrial look allows for seamless integration into virtually any in-home application. The SSW-4 is designed to be powered by the JBL Synthesis SDA 8300, 8-channel, 300W power amplifier. Each SDA 8300 can power up to eight SSW-4 subwoofers at 300W RMS to offer a complete in-wall solution to your architectural audio needs.