Yeah, i'd say you would need a sub for sure. THe main advantage to using a horn like the BK-16 or fidelio would be that ytou could use a 12 db crossover with the sub, and still cross it over at 80-90 Hz. That MAY lead to better blending/imaging. Other than that, heck, just go with a BR box is what I say, tuned to say 70 HZ, and nicely underdamped. -akhilesh