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The Rockville DV12K51 is a loaded bass package: two 12-inch K5 subwoofers already mounted in a vented enclosure, wired to a 1-ohm final impedance. Rockville rates it at 2,800 watts peak and 700 watts RMS continuous. The box is 3/4-inch MDF, stapled, bonded and braced, which is sturdier construction than the thin particle-board boxes common at the entry level. It suits someone who wants big output without building a box or matching drivers, and who has an amplifier stable at 1 ohm. Against separate subs and a custom enclosure it saves the build work, but it is a large, heavy single unit and the 1-ohm load limits which amps can drive it.
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Lowest price we've seen: $199.95 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
The Rockville DV12K51 is a pair of 12-inch K5 Series car subwoofers that come pre-loaded in a vented enclosure. The wired final impedance is 1 ohm. Peak power handling is 2800 watts, with 700 watts continuous RMS.
The enclosure is made of ¾" MDF that is bonded, stapled and braced. It has computer-designed vents, is angled at 15% for bass alignment, and is covered in aviation grade tweed carpet. Speaker wire connects through Satin Nickel push terminals. Each sub has 1.82 cu ft of air space, and the enclosure is tuned to 35 Hz.
Each subwoofer has a 2" 4-layer black aluminum voice coil wound with OFC (100% copper) wire, a 50 oz magnet and a cast iron basket with a black sanded finish. The cone is fiber-reinforced, non-pressed paper with blue stitching reinforcement. It sits in a thick foam surround and is topped with a polypropylene dustcap. A vented hole in the T-yoke helps dissipate heat. A mounting gasket with Rockville branding helps seal each subwoofer air-tight when mounted.