This is a package deal that includes (2) Skar Audio SDR-12 D2 Subwoofers. The Skar Audio SDR series was engineered to dish out reliable, hard hitting, and low spectrum sound. Featuring a high flux ferrite motor, this woofer will provide extreme power handling for extended periods of time. The SDR series will quickly become a customer favorite, as it's perfect for people just entering the world of car audio all the way up to seasoned pros. The SDR series features a 2. 5” high temperature 4-layer high temperature copper voice coil that is attached to our Skar Audio signature red spider. The surround on the SDR series is a high roll foam surround which allows the woofer to produce riveting low end bass response. The SDR series has a max power rating of 1, 200 watts and a RMS power rating of 600 watts.