This Klipsch Reference R-12SW subwoofer features a 12" spun-copper IMG (injection-molded graphite) woofer and built-in digital amplifier, so you can easily add robust bass to your existing audio setup.
Just love this subwoofer. I had a Cerwin-Vega 12" sub for 10yrs and was so upset when it died and I didnt think I would ever find one I like, but after reading the reviews for this and then hearing it in person, I can tell you its killer and well worth the price especially given the fact it should last you a good decade!!