i emailed jbl and they said 8 hours of modeate volume will break it in fine.
but here is the sub box in the trunk.
i plan on carpeting it when i get my next car(hopefully soon) so it will match the trunk.
i didnt do all the box i helped. most of the credit should go to my friend joe. i wish i had his skill, i knew what i was doing by designing it but he has all the woodworking skills so our skills together turned out pretty good, he want to do a custom box for my next car.
1999 Pontiac Bonneville SLE 80,000 miles
Mods: Silverstar low beams, Kenwood MP-828, JBL 6x9, Polk 5 1/4 comps, 2 JBL 12 in subs, 900w Rockford Fosgate Amp, Flowmaster 80, CyberWhite Fog Lights.