@pos You may be interested to know that Erin also measured your
rePhase settings on my OpenDRC and the only substantial difference seems to be the MiniDSP tweeter looks 0.6 - 1dB lower (to its benefit, imo).
Interesting indeed, thanks for posting this!
Did not realize the speaker tested by Erin was also yours!
The rephase settings found in the google doc are adjusted to a fraction of a dB based on the measurement of actual BSS devices, which might differ from the Crown amp used in Erin's measurement. I never got around measuring the actual output of one of these Crown amp.
For one thing the Crown amp and the amp you are using with the openDRC might react differently to the impedance rise in the UHF (albeit a minimal one, thanks to the passive lpad).
Another possible reason would be a small gain difference between the two channels of either (or both) amps, or even possible DACs.
The best way to deal with this parameter would be to measure the actual output of the amp with a multi-meter and adjust gains accordingly.
This is of course especially true if you are using different amps (or DACs) for the woofer and the compression driver.
If I want to improve the response using Erin's data, will the OpenDRC have enough taps to start with your filters and add additional ones? Or would it be better to subtract out your preset from Erin's measurement and start from scratch?
I would definitely adjust using the existing rephase settings, possibly canceling some specific EQ points (like the ones around 250Hz) to start from scratch in these specific areas only. That is already what I did when adjusting the original preset based on measurements of BSS units, and this can be seen as I used different EQ banks for that part.
Contrary to analog EQs, and even digital IIR/biquad ones, with FIR/convolution you can use as many EQ points as you want without advert effects (noise, distortion and what not). What matters are the resulting magnitude and phase target curves, regardless of the EQ points used to obtain them. So you might want to chose the easiest path.
Regarding taps limitations, the original rephase settings are already at the limit of what the openDRC can do on the LF side, especially on that 21Hz EQ. If you need to do some additional LF EQs (based on Erin's measurement, or on measurement of your own speaker/room system) you might want to use the IIR section of the openDRC for these.
I'd be curious to hear your opinion once you can compare the flat HF response vs the original one. I have a feeling that dip at 6.5kHz might be there for a reason (has to be, right! right?...), although I must admit I struggle to understand what it would be. I chose to let that alone on my own system, but might change my mind based on your report