Well, thats the closest that i can explain the sound, and it only happens at higher volume levels, and ONLY out of the voice coil vent in the magnet. Now i already took one back because of this, but then this one makes the noise too. So im thinking it could simply be the sound of air rushing out of the vent at high speeds. not only that my speaker is out of the box so ive no way to tell if it will make the sound inside of a box, not only that you cant hear it unless you stick your ear near the vent. nothing rattles when i shake the speaker and it sounds fine otherwise. so what are your thoughts on the matter?