Product Description Pioneer's S-W301 subwoofer is designed to seamlessly integrate into your home theater and take advantage of the Phase Control bass management system built into Pioneer home theater receivers. An extra-long throw, paper-composite cone 8" subwoofer is built with a large roll rubber surround for extreme low frequency reproduction without damage. 150 watts of power is delivered by a built-in Class AB amplifier for wide dynamic range making this subwoofer great for both 2-channel audio playback and home theater LFE duty. For port air turbulence reduction, a flared port is front mounted onto the cabinet.