Debugging the upperbass I mentioned that in spite of this gain, I still hear the absence of the as yet not completed mid-bass horns.
In response to that comment, Romy wrote:
"...I still do not know why you have weakness in 80-160Hz octave. Your upperbass shall cover it perfectly fine. Can you post sweep of your upperbass alone with no crossover. Actually I would need 4 sweeps if you do not mind.
1) Regular slow sweep were 20-20000 is passed within 15-20 seconds from horn default position
2) Regular vibrating sweep were 20-20000 is passed within 10 seconds
3) Regular slow sweep were 20-20000 is passed within 15-20 seconds but from different location, from another perpendicular wall
4) Regular slow sweep with your other channels attached electrically but the horn are plugged and do not radiate sound.
I do think that you have some kind of bug as I feel that your upperbass shall not have the 80-160Hz problem..."
Here are the sweeps (all measurements done with no filters on the upper-bass horns; microphone placed in listening position about 12 feet away):
Above: 1) Both upper-bass horns in their normal position, playing a succession of narrowly spaced tones from 20-20KHz
Above: 2) Same as previous image, but this time playing a succession of not so narrowly spaced vibrating or warble tones from 20-20KHz
(I used recorded tones for the "vibrating" sweeps; they are not as closely spaced as the non-vibrating tones in the previous image, which were created using a tone generator)
Above: A single upper-bass horn, playing a succession of narrowly spaced tones from 20-20KHz
Above: 3) Same as previous image, but this time the horn was moved to an alternate position.
Above: 4) Both upper-bass horns in their normal position, playing a succession of narrowly spaced tones from 20-20KHz, with all mid and HF drivers connected, but physically muted.
I did one more sweep running the lower-bass modules as well, which indicated that they are taking over below the upper-bass horns, right about where they should. In light of this, it is unlikely that I am correct in stating that I was hearing a lack of output in the 80-160Hz octave.
To be continued...