This is a an over all good 12" subwoofer. The materials used are all good : rubber surround, 225rms/450peak, magnet covers : 60oz, and nickel plated screw terminals. The cone is composite plastic like. It however lacks rigity.. flex alot. I enjoyed the sub for the time I had it working with my MTX 2160 thereafter it was stolen. PEOPLE IF YOU HAVE ANYKIND OF AUDIO EQUIPMENT WORTH MORE THAN $200, PLEASE SPEND THAT EXTRA FOR AN ALARM...