2 Pairs Of Kicker 41KSC684 6x8" 2-Way Car Speakers+4 Channel Amplifier+Amp Kit KS-Series 2-Way Car Speakers. Peak Power Ratings: 300 Watts per Pair/150 Watts per Speaker, RMS Power Ratings: 150 Watts per Pair/75 Watts per Speaker. Impedance: 4-Ohms, Speaker Design: 2-Way. Woofer [in, mm]: 6x8, 160x200, Tweeter [in,mm]: 3/4, 20. Sensitivity [1W, 1m]: 90, Frequency Response [Hz]: 45-21k, Mounting Hole Diameter [in, mm]: 5x7-3/16, 127x182 Top Mount Depth [in, mm]: 2-1/4, 58. Bottom Mount Depth [in, mm]: 2-5/8, 67, Tweeter Protrusion [in,mm]: 1/16, 2, Tweeter Magnet Material: Neodymium. Tweeter Dome Material: Silk, Tweeter Design: Dome. Woofer Cone Material: Polypropylene, Woofer Surround Material: Rubber and 1600 Watt Peak/800w RMS 4 Channel Amplifier Car Stereo Amp High-Speed MOSFET Power Supply. Studio-Grade Bipolar Output Stage Transistors, Fully Adjustable 12dB Bass Equalizer. 2-Ohm Stable Stereo, 4-Ohm Mono Bridgeable, 3 Channel Mixed-Mono Capable. Mute and Delay Soft Start System, Full IC-Controlled Protection Circuitry, 2 CH / 4 CH Input Mode Switch. RCA Preamp Line Output, ELNA Brand Audiophile Capacitors 8 Volt Preamp Circuitry. Status Mode LED Indicator, Minimum THD:  200 @ 100Hz, 60 Amp Maxi Fuse. Dimensions: (W x H x L) 8.5 x 1.8 x 13 4 Gauge 4 Channel Car Amplifier Wiring Installation Kit. (2) 17 High Grade Twisted Pair of 100% Copper RCA Cable, 17 4 Gauge Translucent Blue SuperFlex Power Cables. 17 18 Gauge Blue Remote Cable, 17 16 Gauge Clear Speaker Wire. 3 4 Gauge Clear SuperFlex Ground Wire, Soft abrasion proof insulating jacket allows for 100% improved flexibility. PVC outer jacket can with-stand an extreme temperature range of -40 to 220 degrees F