When I moved into the room I have now, I had to listen with much closer proximity. From this position, I could sometimes hear the elements rattle. I took off the grille sox, unscrewed all the stock screws and replaced them with longer screws and managed to crack some of the plastic frames. And it didn't work anyway. A month or so later, one speaker slowly went quiet. Acoustat was out of business by this time. I sent them to speaker heaven. This was before I had a computer and access to all the info available today. If I had it to do over again, things might have turned out differently, dunno. It bumms me just thinking about it.