Large speakers plus EQ, what have you done?

I had some large Usher speakers for my large audio rooms then I moved to a new house with a 16’ audio rooms. I tried using dsp to tame the bass for 3 years. I got it where it was ok sounding but something was missing. I also had the super bass traps, asc corner tube traps, etc..

I ended up buying some new Revel speakers with multiple smaller woofers. Got rid of dsp, all super bass traps, and the pair of other traps, and I have all the bass that I want, as quiet or as loud as I want. I’m putting up all the speakers/traps up for sale. Size your speaker to the room without al the overhead you need to get something to big to sound good in a smaller room.

I use the Emerald Audio BOM (Bass Optimization Module) with my KEF 107 speakers and it works well. 

I don’t know of this qualifies as to your question or if I am off base here, but...I have the Legacy Focus XD’s which produce (to my ears) the best bass I have ever heard. To control it I purchased the Matching Wavelet II outboard crossover/DSP/Preamp and it made a massive improvement in the bass performance. The bass is not boomy, it is deep, defined and well textured-it gives me goosebumps. As I have made improvements to electronics and cabling it just keeps getting better in the bass. The Wavelet can be purchased and programed to mate to non Legacy speakers too. It works!

I have large floorstanders with usable response down to 25Hz, which fits your criteria. These are positioned in a very large room with good symmetry and minimal surface reflections. The crossovers are well designed and free of glaring flaws, yielding fairly even response at my listening position as measured using REW. What I needed was a bump in bass to suit my tastes and minor adjustments along the frequency response curve to smooth and taper.

I originally used DSP but eventually abandoned this in favor of a dbx 2231 dual 31-band graphic EQ, using REW measurements to assess the results. This EQ delivered solid measurements in ASR’s testing, but I was nevertheless concerned that it would increase the noise floor, diminish resolution, or compromise the expansive soundstage I enjoy in a perceptible way. My own testing has demonstrated this not to be the case. I have been completely satisfied with the results.

While this route cannot resolve glaring room issues or flawed speaker/crossover design, it is a demonstrably viable option for those wanting to contour the bass or entire frequency spectrum to suit their preferences. It is most applicable to those using only balanced XLR interconnects (RCA not supported), who require minimal adjustments, and who use REW to verify the results.