The shipping was super fast! The subwoofer was extremely lightweight and had me weary of actually holding up to its rating of (1500w/750rms). I am now currently pushing 2 of these on a DB drive mononblock amp. I have them dropped down to 2 ohms pushing out 450rms/each. (I wouldnt push these anywhere near the 750rms) They have been holding up now for about a month. The sound quality is amazing and the bass flexes my car. Amazing quality for the price!!