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The Rockville K5 W12K5S2 is a single 2-ohm 12-inch car subwoofer rated at 350 watts RMS (CEA) and 1,400 watts peak. It uses a fiber-reinforced non-pressed paper cone, a thick foam surround, a 50 oz magnet on a cast iron basket, and a 2-inch four-layer aluminum voice coil wound with OFC copper. The 2-ohm single voice coil is aimed at amps that are stable at 2 ohms and at shoppers who want strong output from modest power. It competes with budget 12s on cone area and magnet size rather than on brand pedigree, and owners of entry-level setups tend to see it as a lot of driver for the outlay.
In stockSold by AudiosavingsReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Availability unknown
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Lowest price we've seen: $57.95 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
Owner feedback on the K5 series is generally positive for the output it gives on modest amplifier power, with the cone and magnet called out as solid for the class. Complaints center on the single 2-ohm impedance limiting wiring choices and on the enclosure space it needs.
The Rockville K5 W12K5S2 is a 12-inch car audio subwoofer with a single 2-ohm voice coil. It is rated at 1400 watts peak, 700 watts program and 350 watts RMS (CEA rated).
The voice coil is 2 inches, with 4 layers of black aluminum wound with OFC (100% copper) wire. The motor uses a 50 oz magnet and a 6 mm T-yoke with a 6 mm washer. A vented hole in the T-yoke helps dissipate heat, and rubber boot covers protect the magnet.
The cone is made of fiber-reinforced, non-pressed paper with blue stitching reinforcement, a thick foam surround and a lightweight paper dustcap. The basket is cast iron with a black sanded finish. Chrome-plated binding post terminals accept any gauge wire. A Rockville-branded mounting gasket is included for mounting.
