49L7X181 KICKER Solo-X 18" L7X High Excursion SPL Competition Subwoofer 1ohm DVC

18" SoloX L7X 1 Ohm DVC. It’s developed like no other KICKER subwoofer. Monster Performance from a motor like no other – it includes a massive, triple-stacked ferrite magnet surrounding a hyper-extended pole piece, engineered for an enormous, more linear magnetic field and amazing heat dissipation.

eBay