Kenwood KFC-XW800F - 8" Subwoofer 8" Single 4 ohm Shallow Mount Subwoofer | Power Handling: Peak: 600 watts | RMS: 150 watts | Recommended power range: 50 - 150 watts RMS Carbon-glass fiber composite cone woofer | Butyl rubber surround Super linear spider for maximum control over the woofer's linear motion | Dual magnet drive Removable gasket | Heat transfer system designed to provide ventilation to keep the woofer cool Aluminum-cast basket for long-lasting reliability | Frequency response: 40 - 500 Hz | Sensitivity: 78 dB