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jessie.dazzle wrote:

6dB extra? Relative to what?

Relative to the reference level of my MF channels. Look at the Chenal “B” of the the amp's schematics:

http://www.romythecat.com/Site_Images/6-Chennal_Melquiades_DSET_Amplifier_Rev3.jpg

You see at the channel’s input 30K by 12.1K voltage divider. His attenuates my Upperbass for ~6dB in relation to the rest of my channels. The bass channels is the reference one – it runs wide open a full gain. The rest channels are juts referenced to the bass.

jessie.dazzle wrote:

I think you may have misunderstood; the mid-bass horns are still under construction. I was describing the void I hear in their absence. The plan has always been to let the mid-bass horns run from 90 to around 240Hz. Once they are up and running, I will of course try pushing the low end lower, but I'm not "officially" counting on them for anything under 90Hz.

I see, I thought that you have the mid-bass up and running. What you might do it to use firs order on your bass and to move crossover point upper a bit. I do not know what kind bass modules you use and how good they are in upperbass. 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.

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