Would you notice a difference from a box that is built better(i.e. bracing,resin,ect.) vs a box without bracing/resin even though both boxes have the same specs(size,tuning,port area)?
i had a box with two 12 inch L7's that i didnt use bracing on. and the top pannel flexed like crazy. after a week i put in two threaded rods to keep it from flexing. just with that it was a difference that was very noticeable. in sound and amount of flexing to my car.