I have been using tie down straps tied to the two hooks in the trunk to hold the sub in one place but they end up getting lose and the sub box moves around in the trunk. Anyone have any suggestions on what to use.

 

you can do velcro, L brakets, bungee cords, theres a rubber mat type thing you can use too, you can screw a long nail into the trunk leaving a little bit out so it acts as a stopper...

 

joerockt screwed the box to the trunk tray from the inside (w/woofer temp removed). Do NOT put screw gun through woof upon reinstall like I did...(bought new JL for joe: )

 

I bought some bungee cords from home depot, got blue of course to match the car and they are holding up well. Box hasn't moved since.