Carbon mica cone woofers are light & flexible for more response to the low frequency range; Pulp cones with fixed surround enhances midrange sound pressure & delivers deep & clear sound; Single roll rubber surrounds flexibility prevents distortion & focuses sound for optimum clarity; Punched metal with high numerical aperture improves sound flow by about 30% to conventional model; Heat-resistant voice coils; 2.06 polyetherimide cone midranges; Ferrite magnets (woofers); neodymium magnets (midranges); Imp: 4ohm ; .59 polyetherimide dome tweeter; .5 polyetherimide dome super tweeter; 6 x 9; 4 way; 350W max; 50W RMS; Freq resp: 30Hz-25kHz; Sensitivity: 88dB @ 1W/1m; Mounting depth: 2.25; Pair; Includes 2 grilles, two 11 lengths of speaker wire (each has female quick-slides on one end and bare wire on the other); eight 1 self-tapping screws; 8 speed clips; safety instructions, template & specifications on packaging;