I have tried to model a 80Hz conical horn with hornresp using the jbl 2206. So far with some luck. I am thinking a 3 foot conical horn with a throat of 30 sq.inch and a mouth of 400 sq.inch. Similar to a old post in this forum about a 80Hz Horn. I am just unable to get the smooth response seen in the 9pi model of the 2226 done by Wayne. Or
by the models done elsewhere by volvotreter for the EV15L woofer.

Suggestions about throat size, back chamber, front chamber are more than welcome?

Cheers
Andreas