The 2017 IB3 v2 Series of subwoofers is our higher power handling infinite baffle subwoofer line. Featuring a quad stack magnet motor for clearance under high excursion. Along with single high excursion progressive spider, a multiplayer foam surround attached to a fiber impregnated kraft pulp cone helps keep things under control. A 3″ 2 or 4 layer voice coil yields 33mm of Xmax while keeping moving mass low. The IB3 v2 sets the standard for full featured infinite baffle specific subwoofers. From the subtle nuances of a stand up bass, to the bottom octave filling rattling scene in your favorite movie, the IB3 has you covered.