2) Kicker S8L7-4 8" 900 Watt 4-Ohm Solobaric L7 Car Subs+1000W Amplifier+Amp Kit

Solo-Baric L7 Subwoofer technology continues to maintain the title as the first and foremost authority on bass. It was the world's first patented square subwoofer, supplying the extra decibels needed for deep, musical bass in a mobile audio system.
The Solo-Baric's cutting-edge, square-sub design ultimately means more cone area, more air displacement and, therefore, more decibels than a conventional round woofer. With a patented corner-ribbed, double-stitched Santoprene surround helping to hold the massive motor structure in place, the Solo-Baric L7 provides durability at a high excursion without compromising sound quality.

Features:

Progressive-roll spider keeps stress away from the glue joint of the spider landing for long-lasting reliability
T-cut top plate extends the magnetic field of the motor, adding balanced motor strength throughout the entire excursion path of the voice coil
Solid-dome extended pole piece maintains precise voice-coil control and aids in heat dissipation
Rockville RXD-M3 4000 Watt/2000w RMS Mono Class D 1 Ohm Car Stereo Amplifier With Optical Coupler Technology
Fully Adjustable 12dB / Octave Crossover with Differential Circuitry
Low Pass Filter: 50Hz - 250Hz
Subsonic Filter: 15Hz - 55Hz
Phase Control Switch
Full IC-Controlled Protection Circuitry
Remote Dashboard Subwoofer Control
Frequency Response: 10Hz - 500Hz
Damping Factor: > 275 @ 100Hz
120 Amp External In-Line ANL Fuse Block
Dimensions: (W x H x L) 8.5˝ x 1.8˝ x 14.5˝
Rockville RWK4CU 4 Gauge 2 Channel Complete Car Amplifier Installation Kit 100% Pure Copper RCA Cables
Strand Count: 1862
BC-5W2 Compliant