The Rockville VS12K54 12" K5 1400w Car Subwoofer in Vented Sub Enclosure Box features a single 12" K5 subwoofer pre-loaded into a vented enclosure. It boasts a peak power handling of 1400 Watts, a program power handling of 700 Watts, and a CEA-rated RMS power handling of 350 Watts, with a final impedance of 4 Ohms.

The enclosure is constructed with 3/4" MDF, bonded, stapled, and braced, with computer-designed vents angled at 15% for perfect bass alignment. It is covered in high-quality aviation-grade tweed carpet and features satin nickel speaker wire push terminals. The enclosure air space is 1.52 Cu Ft per subwoofer, and the vent dimensions are 2.25" x 7" x 8.5", with a tuning frequency of 35 Hz.

The subwoofer features 2" 4-layer black aluminum voice coils wound with OFC (100% copper) wire, which is imported from Japan for superior quality compared to standard Chinese wire. The 50 oz. high-quality magnet is housed in a cast iron basket with a black sanded finish, and the fiber-reinforced, ultra-stiff, black non-pressed paper cone is designed to be highly efficient, allowing the speaker to play louder without requiring excessive power.

The thick foam surround provides incredible sound quality with minimal distortion, while the blue stitching cone reinforcement ensures long life. The polypropylene dustcap and gold-plated, spring-loaded push terminals complete the package, with a single 4-Ohm voice coil configuration.

Other features include a vented hole on the T-yoke to enhance heat dissipation, a mounting gasket with Rockville branding for easy, air-tight installation, a high BL magnetic motor gap, and a high-grade black glue that can handle extremely high temperatures, allowing the woofer to handle even more power.

The subwoofer has a cutout diameter of 11.02 inches, a mounting depth of 5.03 inches, a frequency response of 25 Hz - 1.5 kHz, and a sensitivity of 88 dB. The weight of the subwoofer alone is 10.1 Lbs., while the loaded enclosure weighs 37.4 Lbs. and measures 18.25" x 14.25" x 16.25" in size.

The detailed technical specifications include the body construction (non-pressed paper), the gap plate dimensions (80mm inside diameter, 156mm outside diameter, 25mm thickness), the yoke dimensions (145mm outside diameter, 6mm thickness, 50mm pole diameter), and the electrical parameters, such as the voice coil resistance, inductance, and resistance due to eddy current losses.

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