EBX subwoofer boxes feature clear, powerful, detailed bass, high efficiency and small size. The use of long excursion voice coil and double magnet speakers permits to build high SPL systems. Made of thick wood, EBX boxes are compact and simple to install. Their trapezoidal structure limits internal stationary waves; their 360° Reflex Exponential PortsR completely eliminate turbulence and insure fast, thrilling bass.