Dayton Audio's Titanic series subwoofers are world-renowned for  their ability to create deep, hard-hitting bass with minimum distortion.  This line of subwoofers has always been known for prodigious amounts of  Xmax, relatively high sensitivity specifications, and an amazing  ability to handle power. 
Dayton Audio takes everything that has made the Titanic  subwoofers stand out as top-of-the-line subwoofers in the loudspeaker  industry and improves upon them in the Mk 4 generation. The TS320D-4 12" Titanic Mk 4 subwoofer  has been redesigned from the ground up to improve upon every aspect  possible, while maintaining the essence of the Dayton Audio Titanic  series.
It All Starts with the Motor
The re-tooled motor focuses even more magnetic flux in the gap,  for a lower Qes and Qts. This allows for higher fidelity performance in  a similar sized enclosure as the Mk III 12" subwoofer, when more power  is applied.
This American-made subwoofer has the muscle you need to  pressurize your home or mobile audio system with deep, clear, clean  bass. Check the structural integrity of your house, or car, before  applying power!
And Everything that Made the Titanic Subwoofers Famous
Dayton Audio's TS320D-4 Titanic Mark 4 subwoofer is  built with a sturdy aluminum die-cast frame to keep everything perfectly  aligned while handling the insane amounts of air pressure it's capable  of generating inside of a sealed enclosure. An extended pole piece keeps  more of the voice coil in the gap for more motor control.
Frame openings under the spider help to reduce power compression (and  trapped air) and the vented pole piece keeps the edgewound voice coil  cool, for high power handling. The Kevlar-reinforced paper cone resists  deformation under excursion, and the large rubber surround keeps cone  travel linear. For a tight seal on the baffle, an integrated rubber  gasket is pre-mounted to the frame.