MB824MB Subwoofers were designed with a goal of creating an extremely versatile subwoofer capable of producing intense bass response. MB subs were the first to receive Memphiss patented Selectable Impedance Technology allowing you to switch between 2 and 4 on the fly. This along with 4 sizes and a relatively compact profile make MB subs amazingly versatile and capable of performing in a number of applications. The MB824 was designed to provide audio fans