The slot ported enclosures feature the same attractive appearance you are used to from Audiobahn with a black carpet finish and a Audiobahn embroidery. These subwoofer enclosures are constructed from high quality MDF and come equipped with gold binding post terminals for corrosion resistance. Flared Slot Porting The slot port design gives way to a larger surface area for the port, which is important to help decrease port velocity. This also allows for a lower tuning frequency not typically seen in pre-made enclosures. To enhance upon this design, the port is internally flared to help even-out the transition of air from the box through the port. Cone and Surround The subwoofers used in this enclosure feature a high-gloss cone made from high-strength carbon composite with laminated pulp reinforcement. This cone is much sturdier than paper cones, allowing for more aggressive operation. Standing Wave Reduction To reduce the cancellation of sound caused by standing waves, Audiobahn has used geometric simulation design software to model the box with strategic angles. These angles reflect the sound within the box to provide optimal performance. Product Features Dual 12 inch Slot Ported Loaded Subwoofer Enclosure . Power Handling RMS: 800 watts. Carbon composite cone with laminated pulp reinforcement for more aggressive operation. Rubber surround for enhanced excursion. High quality MDF construction. Black carpeted covering. Extended low frequency for deep bass. Flared slotted ports allows for a lower tuning frequency. Bumped back plate. Extended and vented pole piece. Gold binding post terminals for corrosion resistance. 45 oz Strontium magnet. 2 inch 4 Layer voice coils. Frequency Response: 22-1000 Hz. Sensitivity: 99 dB. Impedance: 4 ohm. Dimensions: 16-1/2 inch H x 33 inch W x 15-1/2 inch D