Hypothetical Setup Question

I do not think those sharp frequency response variations (10dB or more) posted above make for a good frequency response. YMMV.

My experience with audio is to use EQ very judiciously and gently. YMMV.
 
I use 25-500hz and 25-3000hz depending on the source and volume.
I wrote about the PEQ setup here, but right now I have 2 subs connected to the Amp Ultra sub out.
 
20-600Hz for me. Individual channel, B&K target. Moving microphone method in REW since individual channel MMM isn't available yet in the WiiM app.

I use 25-500hz and 25-3000hz depending on the source and volume.
I wrote about the PEQ setup here, but right now I have 2 subs connected to the Amp Ultra sub out.

So far so good, unlike correcting full range (all the way to 20KHz), my soundstage remains both wide and deep, with layering, even with correction to 1800Hz. Going to 20KHz was completely wrecking the soundstage. Not so with this cutoff.

-Ed
 
In the end I decided I wanted better control over my crossover timings while remaining able to apply DIRAC to my entire chain. I ordered a second miniDSP Flex, this one with RCA outputs and no DIRAC, and I connected it via Toslink to the second output of my main miniDSP Flex with DIRAC Live license (digital in/outputs model), and then used this wonderful guide for utilizing REW to time align all five elements of my system:
Post in thread '2 Subwoofers combined in miniDSP alignment with mains:
https://www.avnirvana.com/threads/2...minidsp-alignment-with-mains.11981/post-90781

After that, I set up all my crossovers (70Hz for the PC-2000 Pro to the 3000 Micros, and 155Hz for the 3000 Micros to the LS50 Metas), and then applied DIRAC Live (applied from 14-3000Hz). Here are the sweep results (the left and right sweeps are more important to focus on for full spectrum; the combined sweep really only matters maybe from 300Hz and down):
IMG_7756.png
IMG_7758.png
IMG_7760.png

By inserting the second miniDSP, I improved the integration of the large sub, as it has the ability to control timing delays down to the hundredth of a millisecond. Additionally, it has much better slope control for the crossovers. I also was able to reduce clutter since it replaced a DSPeaker Anti-Mode that I was using for room correcting the PC-2000 Pro and also an SMSL SU-1 DAC that I was using for the 3000 Micros, I placed it directly next to the original miniDSP and bought a small media rack to place above them together. I have the WiiM Ultra now locked into, “bit-perfect mode,” by locking volume at 100%, turning off all EQ/RC/Bass Management features, and use the primary miniDSP as digital preamp. Please excuse the Bezalel phone charger; it is blocking the IR port of the second miniDSP so its volume doesn’t change when I adjust the main miniDSP.

IMG_7762.jpeg
IMG_7761.jpeg

-Ed
 
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