Drop-in replacement installation; OPEN & SMOOTH(TM) sound design; Clear, high frequencies & deep rich bass; Low distortion; Midrange/tweeter bridge with Waveguide; High heat-resistant wire voice coils; Carbon & mica-reinforced IMPP woofer cones; Elastic polymer-surround material; 11.3oz ferrite woofer magnets; 11mm & 18mm PET dome tweeters; 2 1/4 cellulose fiber cone midranges; 3,600Hz woofer to midrange crossover; Imp: 4ohm ; Includes multifit installation adapters, screws, speaker lead wires & grilles; Pair; 4-way, 6 x 9 speakers; Freq resp: 35Hz-24kHz; 450W max, 90W RMS; Sensitivity: 89dB @ 1W/1m; 2 7/8 mounting depth;