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: 4Ω .5" polyetherimide dome tweeter 5.25" 3 way 320W max 40W RMS Freq resp: 30Hz–25kHz Sensitivity: 87dB @ 1W/1m Mounting depth: 1.75" 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