Welcome!
You're invited to explore the world of Floyd Toole, Earl Geddes, Duke LeJeune, etc. who are leading the world in domestic speaker design. They each place lots of importance on the room. Toole's "Sound Reproduction" is the consummate audiophile guide for learning how speakers behave in-room. Earl designed some of the first controlled directivity speakers that use professional (low distortion) drivers. And Duke has continued Earl's work (see AudioKinesis.com, also here at Audio Circle).
The only thing missing in Duke's speakers is active design (low voltage signal feeding a much more sophisticated crossover which feeds individual channels of power amplification to each driver) that produces a technically and sonically superior sound.
Each of the above guys support the use of 3 or 4 carefully placed subs to help limit inherent bass peaks/dips. Better than treatments which may not be feasible or DSP room correction which can only address frequency balance in a single location.
