kinda hard to have both... maybe just a box thats easily removable so u can take it out when u race? a good speaker box should be built of very dense material and will therefore be heavy, the weight of the speakers and other components will be minimal compared to the box itself. the only thing i can think of is just take it out when u race thats what i do now, well at the dragstrip anyway i leave it in on the street (in case a hasty getaway is necessary
) but soon mine will be non-removable or at least not-easily-removable and if u go that route youll have to do the same as me and just deal with it. anybody know a better solution post it cuz id like to know as well.