Hello, I just got my MfW-15 moho satin today and it looked good, but it wasn't without problems. When I loaded up transformers beginning scene I heard the flapping. I unscrewed the first four screws on the main plate and then there it was, every single screw was stripped. I then proceeded to unscrew them and then put in bigger screws. Once I was done, I then tried to put face plate back on but 2 of the 4 faceplate screws would not go in, because the nut that was on the back of them fell off on the inside of the subwoofer, so I had to unscrew every single driver screw and pull out the driver and then hammer in the nuts back into place cause apparently it wasn't done well enough at the factory. When I did this, I noticed that there were an extra set of holes for the driver to be screwed in.
This led me to believe that at the factory they must know that there are problems screwing the driver in correctly, cause if they get too much stripping going on, it seems they just turned the driver an in or two in a circle and then drilled new holes and hoped they would not strip the next time. So what I did was drill a 3rd set of holes for the driver screws and turned the driver another inch and then drilled the driver in. Even with the bigger screws you still get stripping cause it doesn't seem to be the screws fault, but rather that the wood is really soft. What they need to do is to put the same nuts that are on the back of the faceplate screws on the back of the driver screws so that they are totally tight.
Well once I got the driver back in place and I went to screw in the faceplate screws, one of the nuts fell out on the inside of the driver again, and since there was no way in hell I was going to unscrew that driver again and risk stripping the screws, I then had to wrap the screw with plumbers tape and insert it into the faceplate. You can't leave it empty because air will escape through the whole and you will hear it disrupting the sound.
Moral of the story, AV123 to me appears to know that they are building their amps and subs, substandard sometimes, yet they still continue to ship to customers either hoping we won't notice or hoping for a miracle. I'm pulling for av123, but they need to really do something about quality control and not cut corners. By the way, once I did this most of the flapping stopped. I bet they fix this probably the subs may even go an extra 1 or 2hz lower.