What kind of vehicle and what kind of power are you running. 33 seems a little low for spl but would be great for daily listening. You say you want an spl box but you want something for daily use. Sounds like you dont know what spl is....
i sure dont if u wanna put it that way and i am sure u dont either for that matter i aint got $250.000 concrete in my car driving it on a trailer....nah i just want to be able to drive everyday and listen to it without burning up my amps this is my second amp the first one smoked now this one keeps going into protection....the box they are in are like 1.2 40 hertz....