One DEQ2496 can help get a handle on the situation...
I admit I need a lot more listening experience before jumping to crazy conclusions.
A digital parametric equalizer like the DEQ2496 is a very potent tool. When used appropriately, it can smooth out the unnatural sounding bass response caused by unfortunate artifacts of reflected sound from the walls, ceiling and floor of your listening room. When used inappropriately, it can suck the life out of your speakers.
No speaker has perfectly flat frequency response. These deviations in frequency response contribute to each speaker's characteristic sound. This is why one speaker might be preferred over another. When a speaker is put into a room with walls, floor and a ceiling, reflected sounds from these boundaries can cancel or reinforce one another further altering the frequency response.
At higher frequencies, hundreds of small peaks and dips can be measured in the frequency response. Attempts to remove all these small deviations would result in colorations to the sound that may not be desirable. The characteristic sound that made a particular speaker attractive could be completely lost. Even if the hundreds of small peaks and dips would be adjusted, it would only be correct for a single position in the room. Moving your head just a few inches would require a completely different set of corrections. Resist the urge to equalize these frequencies.
At low frequencies (below about 300 Hz), the picture is different. There are fewer peaks and dips, but they are much more dramatic. The peaks and dips persist over a much larger portion of the listening area. Dips can't be corrected electronically. Putting out more power at the dip frequency can't help. If the original sound wave from the speaker and reflected waves coming from room boundaries cancel each other, they will cancel at 1 watt or 1000 watts. If you have major dips in the frequency response you can try repositioning your speakers, particularly the subwoofer. Fortunately, dips in the bass response are typically not that noticeable. When an instrument plays that particular frequency, that bass tone may be lost, but the higher harmonics of the instruments tone are still there. To some degree, your brain fills in the missing information.
The situation is different for large low-frequency peaks. These peaks are what tend to make windows and doors vibrate, shake knick-knacks off of shelves, and result in an overall muddy sound to the bass. Fortunately, this CAN be remedied electronically without drastically altering the characteristic sound of your speakers. Typically a room will have 3 large peaks due to added reflections coming from the front/back walls, left/right walls, and the floor/ceiling. Usually, depending on room dimensions, these peaks occur below approximately 300 Hz.
With equalizers, less is more. Limit your use of the equalizer to lowering the largest bass peaks that typically occur below approximately 300 Hz, and you will likely have good results.