James,

RE: "I'd buy an equalizer"

I highly suggest before you do that, you understand what is going on in your room and your ears.

Also, all your equipment is full analog, all that Behringer stuff runs in the digital domain, so it sends the signal through a ADA cycle, which can also harm the sound. It is the reason why most people use the Behringers to EQ just their subs/bass.

I suggest going out and listening to different setups, speakers, rooms, etc and what your perceptions are for everyone one of them. Get some experience just listening.

BTW, I have heard a speaker, with the same enclosure and drivers, but with two different crossovers. Their FR graphs was very similar, but they sounded very different. Very eye (ear) opening. It cracks me up when people ask about a speaker's internal crossover point.