Actually, it was just a trial to see how that worked. I've had 2 pairs of L100T speakers and they worked great with a smallish port.
I am not sure the cabinets are robust enough to run sealed - and I believe I'd need more power to run sealed box mode.
As it is, with a 60w/ch tube amp running the UREIs and them, they do add a nice supplement to the UREI's bass ....
I like having 2 2214s per channel.
I don't play them very loud - and they sound great playing through a number of older Brubeck albums today.