It's tricky, trying to determine where the tipping point is by sheer intuition, but exploring the extent of intuition gives a better feel about whether to proceed with a physical investment.
My amateur intuition told me that I'd get the lower cutoff I needed (with the right driver), at the expense of some top end. I kinda knew that the constriction would cause problems. I'll tweak the concept a while longer; it doesn't feel quite right yet, tho it's close enough now for HornResp.