sorry to ask, but what is a bass tube? I've never heard of this term. Are you refering to the Bazooka sub? If so, most ppl will say that it sucks and is a waste of money, but me, im not hardcore, and don't like so much bass that you cant hear the song, and + if i were to buy an aftermarket set up id have to pay for it =) the bazooka sub gets loud enough and it fits nicely in the trunk and is already wired for me so =)