This is a new pair of MA Audio MA150XE 15" subwoofers that retail for $499.99 plus tax. When you need 15" subs for the competition rounds these are it. These subs handle 900 watts of rock solid power. They have a thermo-cooling motor structure that reduces heat induced distortion, so you can push your music and leave the meltdown worries behind. The dual copper clad aluminum 4 ohm voice coils give you more options for tweaking your bass, whether you're looking to wire up a multi-sub setup or draw more power from your amplifier. You can also wire these subs so they can achieve a 1 ohm load. This will enable your amp to produce maximum power. They are equipped with a black die-cast basket, dual progressive spiders, 150 oz. double-stacked Strontium magnet structures, and a high profile triple treated foam surround for increased power handling. The platinum plated block terminals ensure maximum signal transfer. Complete with a 2 year warranty and our exclusive 30 day money back guarantee.