This sub woofer is by far the finest sub construction wise and sound wise I have ever come across under $200. I purchased a pair of these three years ago. I use them in my home system powering them with a 6,000 watt behringer amp. They are superior by far to any I’ve tested or used. These are the only subs who claim truly to go below 20hz. I have pushed these monsters to the extreme limits of my 6,000 watt amp and they don’t even flinch. I have used and abused these wonders for over three years now and they sound as good as new. The picture does not do them justice. They have over an inch of heavy rubber suspension. They are stitched and glued to cones. They have over an inch of movement and I’ve not noticed any type of cone extrusion. All I can say is BUY THEM! You will not be disappointed. The only drawback on these is that you could seriously underpower them, pushing your amp into clipping, possibly damaging the amp and speakers.