MTX Audio 55 Series 400W 15" Subwoofer - 5515-44Implementing many of the same features found on our TX6 & TX8 Series Subwoofers, the 55 Series can rock hard and loud for extended periods of time, while maintaining accurate and clean bass throughout the party. You will be impressed. The 5512 44 is a 15 dual voice coil, 400 Watt RMS, dual 4 ohm subwoofer built on the MTX tradition of getting more than expected. The 55 Series subs are often used in applications where high quality, detailed bass are