The SW218EB2600 is a high performance loudspeaker defined by its exceptional headroom and an extended frequency response. The SW218EB2600 housing two linear, high excursion 18-inch cone drivers mounted in a vented cabinet and optimally tuned port with flared ends to reduce turbulence and noise under high drive conditions. The loudspeakerís 30Hz to 150Hz operating frequency range allow it to integrate with any Tecnare Loudspeaker System. The subwoofer cabinet is constructed of first grade birch plywood and has a high-quality Polyurea paint finish. The front of the subwoofer is protected by a hex-stanmped, steel grille backed by an acoustically transparent foam. Two ground runners to protect the botton allow stacking the subwoofer in horizontal and vertical position. The subwoofer shall be connected via one 4 point speakON