I modded a em alpha 15 on 40" by 48" (2' floor, 5' front wall, 3' side wall) and got pretty good flat bass to 60hz (pretty good for a dipole without eq).Magnetar thinks it sounded bad on dipole and sent it back.
Thought of crossing it @ 300hz@24db (for under 300hz).
I don't know transient response of dipole, but I would think it would be lousy due to high qts as not much qms to control driver (down low on this baffle)
perhaps the ringing @2500 can be fixed also.........
Any experience ??????????