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):
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.
-Ed