Product Description:The CT Sounds TROPO-2X12D4 is a pre-loaded dual 12” ported car subwoofer box that takes the guesswork out of finding the perfect subwoofers and enclosure for your system. The bass package features two of our TROPO-12-D4 1300-watt max power 12-inch car subwoofers which come pre-installed flush into the 1.25” front baffle using claw nuts and fasteners ensuring an air-tight seal. Additionally, the dual 4-ohm subwoofers are pre-wired inside the enclosure using 12 gauge ofc wire for a 1-ohm final impedance at the terminal cup. This is a true plug-n-play offering - simply run a +/- wire from the terminal cup to the +/- speaker terminals of your amplifier. The unique high-performance kerf-port, typically only seen in custom enclosures, allows the air pressure to exit smoothly and quickly creating extreme levels of responsive bass output. Furthermore, from the top to the bottom of the interior port walls is a 3-mm rabbet-groove that runs 80-mm into the port on the left/right interior port walls - this allows the premium black carpet to lay flush inside the port with zero-edge providing a smooth exit for the air and eliminating port-noise. Lastly, the enclosure was constructed using advanced joinery practices - dado joints connect the exterior left, right, top, bottom, and back wood pieces, and miter joints connect the corners of the box by cutting the wood at a 45-degree angle. These joinery practices ensure maximum surface contact and eliminate vibration. From the second you open the package, to the moment you pull the loaded enclosure out of the thick cardboard box, you will immediately recognize the craftsmanship and details that went into not just the secure packaging but the overall design of this product. Specifications:Subwoofer Box Size: 12"Subwoofer Box Style: Kerf-PortNumber of Subwoofer(s): 2 SubwoofersIncluded Subwoofer(s): TROPO-12-D4Final Impedance Load: 1 OhmRMS Power: 1300 WattMAX Power: 2600 WattTuning Frequency: 33 HzTotal Volume: 3.52 ft3Sensitivity: 90.2 dBDimensions:Length: 35.50"Height: 14.75"Depth (Bottom): 16.85"Depth (Top): 15.00"