The X Series of subwoofers is our all around daily sub. We offer the BP option (a machined compression plug), for increased cooling and higher thermal powerhandling. A multilayer foam surround is attached to a fiber impregnated kraft pulp cone which helps keep things under control in high power applications. A 3" 4 layer aluminum voice coil yields 20mm of Xmax while keeping the motor force high. The X series will work in most enclosure types (sealed, ported, bandpass). Light weight and versatile, the X Series works in a variety of applications from incredibly detailed sound quality systems, to ground pounding multi sub monsters. It comes standard with a white Fi logo on a rigid pressed kraft cap with the option of our hard dustcap and choice of colored Fi logos.