BOSS Audio Systems BE10AE Elite Series Car Audio Amplifier 10 Inch Subwoofer Package – 800 Watt Sub With Passive Radiator, Built-in Class D Monoblock Amplifier, For Truck Boxes and Enclosures Stereo - Walmart.com
Kicker 47KBRW12 ReFLEX™ 12" passive radiator — big bass without a ported enclosure at Crutchfield