I always thought bottoming out ment the box was to small or to big for the subs parameters. Have you talked to atomic about the subs specs for box size ported or sealed.
Usually a smaller enclosure will increase the sub's mechanical power handling. Are you running it within recommended specs?
This is a sealed box? You want it smaller? Just add some 2x4's or what ever to the inside to reduce the internal volume of your current box. That would be alot easier than rebuilding the whole box, unless you are way off on your original size.
its ported, and before the added 2x4s its ~ 4.1-4.2 cu ft after all displacements. If the subs require ~2.75-3.00 cu ft for a pair of airspace, then I might as well just make a different box.
Oops guess I was no help at all then.
x2; it happens because of too much power which causes the sub to reach its mechanical limits (ie, bottom out).
