Well the subwoofer is designed d to work with the 5500 speakers (subwoofer high cut) so adjust the subwoofer volume so that it provides low end, but not so much it becomes obvious over the other speakers. Most people have their subs too loud.
If you're unsure, buy a sound pressure meter and use pink noise test tone, and calibrate each speaker to identical speaker levels.
If you're unsure, buy a sound pressure meter and use pink noise test tone, and calibrate each speaker to identical speaker levels.