After experimenting a lot with positioning, I was able to get better results of the bass response. Good enough so I could apply the second method. To good results.

This was the step response I got with the first method:
Now the new step response:

Any thoughts?

Thank you very much for takin the time to consider the situation. Yes, the room is asymmetric and challenging. I have tried other positions to the speakers, but the excess phase did not change much. Again, the good news is that the filters are working very well, and the setup is sounding excellent. ...

I have uploaded two working folders. one of them contains the filters generated without any pre-filtering. The others, the filters using the allpass that is also on the folder. Both folders contain a sub-folder named test, that carries the measurement after the filter applied (in the case of the pre...

Yep. Challenging, to say the least. But, on the bright side, raw measurements return an early IACC of 81% and overall of 70%. Post correction, it shows 86% and 76% respectively. Sweet sounding

Thanks. I considered this other method, but I couldnt get around the spikes of the excess phase of my left channel (two spikes one at 56 and the other at 60hz). The allpass would have a Q of about 25. To the right channel, I can generate an all pass of q=10 at 58hz that aligns perfectly with the exc...

Yep. You are right.

Now TD Addition and Mono measurement (after the filters) match precisely.

Thank you once again. And eagerly waiting for the new features.

Yes. It was a time domain addition. Please ignore the legend. I see now that I made a mistake. I wanted to rename curve3, and ended up renaming curve 1.

The mono measurement is with the filters loaded, without any pre filtering.

Thanks. I will be eagerly waiting for your good news.

To be honest, what intrigued me most was the difference in frequency response when adding left and right post filter compared to the mono measurement

For now, just enjoying the music.

Hello, just wanted to share my experience designing this prefilter. In the below chart, you will find the measurement of the frequency response after filter design. Left and Right channel are curves 1 and 2. Their addition (TD-Function) is curve 3. Curve 4 is another measurement, taken in mono, show...

For sure. I have uploaded the project folder in that same dropbox folder used for the trial tracks. thank you very much for the support.

Filter generation is 6/6 6/6, PRC 1/0, double length, no subsonic filter.