Show off your subs/air setups people. I need some inspiration for a new sub box build.
i have tumbled many a sub box in daily driving conditions.,.well when you do fiberglass it's so perfectly formed that the friction does a lot of keeping it to the wall. You could do adhesive Velcro straps, which would be over kill and totally safe feeling for your likely expensive sub. I'd imagine you'd remove it for auto-x which is the only time you'd make enough G to worry about it.
I vote fiberglass.