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This is a complete single-subwoofer bass package: a Rockville W12K9D2 V3 12-inch dual 2-ohm sub rated 1,000 watts RMS (4,000 peak), a KRYPTON-M3 mono amp rated 1,000 watts RMS at 1 ohm (4,000 peak) with a remote level knob, a vented 1.22 cu. ft. MDF enclosure, a 4-gauge wiring kit, speaker wire and terminals. Buying the matched set saves you from picking a box and amp that fit the sub. The dual 2-ohm voice coils wire to a 1-ohm load, which is exactly what the KRYPTON-M3 is built for. It suits first-time bass builders and budget systems that want loud output from one 12; against separates from established car-audio brands, it trades refinement and long-term resale for raw power per dollar and one-box convenience.
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Owner feedback on Rockville's K9 subs and Krypton amps is split: buyers praise the output for the money and the complete kit, while others report amps failing early or subs not lasting.
This bundle pairs a Rockville 12-inch dual 2-ohm subwoofer with a mono amplifier, an amp wiring kit and a vented enclosure. The subwoofer is rated at 4000 watts peak and 1000 watts RMS (CEA rated). The KRYPTON-M3 amplifier is rated at 4000 watts peak and 1000 watts Dyno-certified RMS, and it comes with a remote.
The K9 V3 subwoofer has several changes meant to keep the voice coil cooler. It uses the same dustcap as the Punisher series and adds an inner dustcap to stop heat from building up in the voice coil. The pole vent is smaller, and a voice coil spacer was added. The cone has a smooth finish so the dustcap can be glued on more securely.
The enclosure is a single-12-inch vented box made of 3/4" MDF. The wiring kit includes RCA cables.