Review summary of Sony XSW4021 4" Round Component System Speaker
The Sony XS-W4021 Car Subwoofer Features: 4" Polypropylene Woofer cone,1-1/8" Paper Dome tweeter, 120W max input power (20W RMS), 4O Voice Coil. Sony's XS-W4021 4" speakers feature a durable polypropylene cone and PEI balanced dome tweeter for crisp outpu