JL Audio CP112-W0v3 

• slot-ported enclosure with one 12" W0v3 subwoofer
• 5/8" medium density fiberboard construction covered with dark gray carpet
• 4-ohm impedance
• power handling: 75-300 watts RMS (600 watts peak power)
• frequency response: 22-250 Hz
• sensitivity: 86 dB
• 16-1/2"W x 15-3/8"H x 20-3/4"D1 x 16-5/8"D2

Kicker 40KX400.1

• Mono Subwoofer amplifier
• 200W RMS x 1 @4ohms (400W RMS x 1 @2ohms)
• Class D amp technology with boost-converter power supply allows amp to achieve near 80 percent efficiency
• variable low-pass filter (40-160Hz, 24 dB/octave)
• Kick EQ+ parametric bass boost (0-18 dB at 20-80 Hz with bandwidth adjustment 1-5)
• variable subsonic filter (10-80Hz, 24 dB/octave)
• front-mounted controls protected behind fold-down door with magnetic latches
• wired remote level control included
• Fail-Safe Integration Technology eliminates noise from your vehicle's electrical system
• preamp and speaker-level inputs (speaker wire to RCA adapter required for speaker-level input)  
• 4-gauge power and ground leads and a 60-amp fuse recommended — wiring and hardware not included with amplifier
• no onboard fuses — when installing multiple amplifiers in a system, an additional 60-amp in-line fuse between the distribution block and this amplifier is recommended
• Preamp outputs
• 8-1/16"W x 2-3/16"H x 8-5/16"D