i just got a pair of Wharfedale Diamond 9.4s. set them up and messed around with settings. i ended up turning the bass down -5 and it still sounds pretty basey. i have a subwoofer that i had to turn off altoghter.
i am also getting much more sound from my center speaker, i had to turn that down to -9 to equalize the audio. i only have front and center speakers (plus sub).
i am obviously doing something wrong. room size 20x20ish. so-so polk center and kef sub.
You may have to work with speaker placement. Perhaps bring them out from the wall a bit and use less toe in. Google (or whatever search engine) speaker placement and see what you find.