Alpine PWA-S10V 750W Single 10" Vented Subwoofer Enclosure with Built-In Amplifier 10" Bass Line Series Subwoofer Built-In 250W RMS Class D Amplifier Durable Box Construction with Textured Vinyl Finish Enclosure Dimensions: 10-1/2" TD x 13-1/8" BD x 21-11/16" W x 13-13/16" H