BASSBOSS VS21-MK3 2500W Powered Subwoofer - 21"Add deep and punchy bass to your sound system with the BASSBOSS VS21 MK3, a unique hybrid subwoofer design that provides low frequency extension from a single 21" subwoofer in a combination with the hard hitting punch of horn loaded subwoofers. The subwoofer is well suited for festivals, touring systems, high intensity nightclubs, art cars, and more. The VS21 MK3 is a vented, short horn hybrid sixth order hybrid subwoofer, which features a massive