Yes, I agree with the above poster... I would also not cut off anything below 80Hz from going to your monitors unless they were not designed to reproduce such frequencies. Subs don't do a good job of reproducing mid bass frequencies, and it is difficult to get them to match the tone, attack, and speed of your main speakers. The quality of bass that different subs produce can vary a great deal. Some subs can help the music in certain respects, but other times they can take away from the experience as well.
