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1)      If you decided to use the 12” JBL 2206H driver then I doubt  that you might talk about 4” throat. A 12” driver with wide outer suspension might go with 7”-8” throat. The 6” might do, though it might be a stretch. The 4” I think it too much.

2)      With 40Hz cutoff of non-rapid Tractrix opening (that most like you will use) and 4” throat you no way will end up with 7'6" horn’s length. I have no way now to look at the right number but how I “feel” is you shell be arriving under 8’ of length and 40Hz cutoff with 8” throat. With 4” throat you will be looking at 12” or so…

3)      If you planning to move next year then it does make send to stats he constriction at the new place. You will take used consideration the idiosyncrasies of the new real-estate, room layout, and the recourses of the local subcontractors. With properly-made mass-loaded 40Hz it might be important.

4)      So, the 3-Way system. 40-400, 500-10K and up most likely. It might do. I personally like the “fundamental” channel that allow MF driver to run free. If you have a good MF driver that cans confidants, linearly and with good quality to all the way down to 500Hz then it is very good.

5)      Your MF channel is very much directional and need be at conventional distance from floor.  Your 40Hz will have a mouth let say 6x4 feet that is very unconventional and will not be sitting next to the MF channels. So, you most likely will hang it above or place them on the sides. The 400Hz of first order it relatively directional signal, so be reaper that the 40Hz will suck imaging out MF channel. Pay attention what Macondo does. It has a small “local” 100Hz horn that cares the “location” of lower MF and ground it to the necessary spot. In this configuration the location of lower frequency channels become less important. Jessie for his Project used the similar configuration and pay attention how offensive he was planning to go – he plans to put his 40Hz horn in other side of listing position…. and who know – it might work and his upper bass horn hold the right location of  fairly directional lower mid range.  There are a lot of moments like this in horn practice.

6)      Rane active crossovers in my view are very sub acceptable, particularly in bass,  but it is me… what we are taking about bass then it is very difficult to go with active devise….

7)      If you have an idea how to make the 40Hz horn visually pleasing then it might be very interesting. I truly would like to see how it will turn out to be. I will do my 40Hz horn if I decide to move, so any ideas of make 40Hz with “humane face” sound very practical to me. Alternately you might go not for 40Hz but for 25Hz and instead of moving to North Carolina you could move into your new 25Hz horn. :-)

8)      If you planning to make the 40Hz horn commercially available than what you feel might be the conditions? Jeffery (from Indiana?) does 40Hz for GOTO driver and the last time he showed up at this site he was looking at $15K for the job. It sounds like here and there reasonable.  Is any specific price target that you have in your mind. I do not ask how much it will cost but rather what you feel is the prices that make you worth to do it. The reason I ask is that if I go for the similar project then I would like to know where the threshold is after (or before) which it makes sense do not do it myself but to outsource it.

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