The amp powering this 12 is a Kicker ZX1000.1, which puts out lets say 1400 max RMS. audiovolt has it right don't believe all the marketing b.s The kicker L5 is a good choice in as long as you follow the spl box designs from kicker. 1-16 of 333 results for "Loudest Subwoofers" Skar Audio VXF-12 D4 12" 3000 Watt Max Power Dual 4 Ohm Competition Car Subwoofer 4.5 out of 5 stars 45 $269.99 $ 269. all of the above and im going to toss out one more, Kicker L7 15, not the greatest sound quality on earth, but loud as hell, although peronally id go with the HDC3, less than 300$ and in a good install with the right amount of Power Want to go big and buy the best 15-inch subwoofer money can buy? The subwoofer was mounted in a 5 cubic foot SEALED test enclosure with added styrofoam to simulate Phoenix's recommended 3 cubic foot enclosure size. Taking durability into consideration, this well-built subwoofer comes with a single voice coil, butyl rubber surrounds and a high-quality fiber cone as well as an outstanding heat transfer design. Check our roundup followed by our buying guide and see which unit deserves your attention. To help you find the best car subwoofer and take the quality of your audio system to the next level, we’ve compiled a list of 15 good-quality subwoofers – all different products with different price tags, so you’re sure to find at least Best 15-Inch Subwoofers: Enjoy Deep Powerful Uninterrupted Bass Tones Our top picks for the best quality 15-inch subwoofers This is the best 15-inch subwoofer for your car audio system. The article doesn't specify what Im looking to get as loud as possible, with just 1 12 sub.....the problem is, is that I have limited space and power. In car testing was done in a Corvette. The box it will be in, is a 2.5 net cubic box, tuned to 38 Hz.