I ordered the LMS-5400 from Parts-Express and that's the way the whole subwoofer is listed on the invoice and shipped. The HEAVY magnet is in one box and the big cone is in a separate box. You attach them with six bolts and a hex wrench. So if you order the ~$925 LMS-5400 you are getting the entire product that all you need to do is assemble and hook up to an amp. And if you want the max output, get closer to a REAL 4,000w as it is significantly better than 2,400w that I initially used. I ran mine with a channel from a SpeakerPower SP2-8000, initially at 4 ohms and then wired down to 1 ohms to get the 4,000w. As long as you are using this in a home theater living room, the SpeakerPower appears to handle it but I wouldn't wire any other amps down to 1 ohm, without getting some sort of recommendation.