Why does it seems people use SO much more bracing for home theater enclosures than in car audio? I usually double baffle only if my speakers weigh more than 20 lbs. Here I see enclosures 1.5" thick all around AND with bracing on the inside for a single sealed 10" or 12". What gives? You can't tell me that a properly built box .75" all around with no bracing is going to flex with only a 10" driver.