Many of the DSP non-subscribers must have marvelously paired speakers and rooms. Somehow every room I've ever used did have plenty of issues, bass mostly.
While plenty of treatments (to the point of needing to close one's eyes) do work, I could not happily live with my current system without the DSPeaker Anti-Mode 2.0 room correction unit with digital equalization.
While it's not a bad room and the sound is anchored by Raidho D2 floorstanders, the room still had an effect on bass flatness and response, and the Raidhos have a small bass 80-120 upper bass hump that needs tamed (at least to me).
With room correction performed, and very judicious and minor equalization, the speakers are very flat (+-2) from 30Hz-10kHz. The difference is stunning. All of the Raidho resolution and tonality remains with the excess bass removed.
Anyone who has heard the A/B comparison with the bypass on or off has immediately noticed the more open transparent sound with room correction and DSP activated, and with true flat bass to 30Hz. It sounds great, and my DSPeaker unit is a non-negotiable 'keeper' in my system.