(2) Kicker S12L7-4 12" Solo Baric Subwoofers+Vented Box+Hifonics 2400w Amplifier Square vs. Round: More cone area results in greater sound pressure produced by the woofer. The massive motor structure of the L7 paired with KICKER's patented square-woofer technology provides extreme output capability. Heat-sinking cast aluminum basket provides a strong motor foundation and maintains low temperatures during long-term operation Size: 12" (30.5 cm). Impedance(Ohms): 2 or 4 DVC. Peak Power Handling: 1500 watts. Peak RMS Handling: 750 watts. Sensitivity: 88.6 dB. Frequency Response: 20-100 Hz. Mounting Depth: 6-11/16" (16.9 cm). Mounting Cutout, Square: 11-1/16" (28.1 cm) Dual 12" Vented/Ported Square Subwoofer Enclosure. Designed For Square Subwoofers Such as The Solo Baric L7/L5/L3. Machine precision cut mounting holes.  USA Heavy Duty MDF Construction. Top of the line Glue for extra durable adhesion. High quality GOLD spring loaded terminals. Designed, tested, and engineered to work perfectly with 12" Kicker Solobaric L5 or L7 subs. 2400W RMS Mono Block Class D Car Amplifier+Bass Remote. Power Output: 2400 Watts x 1 Channel @ 1 ohms. Power Output: 1200 Watts x 1 Channel @ 2 ohms. Illuminated Hifonics badge. Old School Hifonics Heatsink for Superior Heat Dissipation. Military Grade PCB. SPC - Simpatico Coil Design. HSMD - Hifonics Surface Mount Design. PWM MOSFET Power Supply for Maximum Current Levels 0 AWG (American Wire Gauge) Complete Car Amp Installation Wire Kit. 17  0 Gauge Translucent Blue SuperFlex Power Cable. 3  0 Gauge Translucent Black SuperFlex Ground Cable. Gold Plated ANL Heat Resistance Fuse Holder. 200 Amp ANL Gold Plated Fuse. 1  17 High Grade Twisted Pair of RCA Interconnects. 25 Translucent Blue Speaker Wire. 7 Split Loom Tubing