Hifonics BRX12D4 Brutus Dual Subwoofer, 4-Ohm 450-Watt 12-Inch 450W 12" Brutus Series Dual 4 ohm Subwoofer. Heavy duty ABS protective motor cap. Powder coated deep draw stamped steel basket. ABS rim ring with blue illumination. Dual resin infused textile spiders. Operates in sealed and ported enclosures. 2.5" High temperature voice coil. 56 oz Vented motor.