.
.
I had/have (parted. but here) Jantzen 'stats* ...incredible highs/mids , but the sweet spot was about 2 inches wide , which is the reason that I so enjoy the ESS Heil AMT drivers ...same great h/m , but huge sweet spot.

have a friend who picked up some CARVER AMAZING panel speakers . Got a good price as they were DOA. He found Bob Carver's email address and asked him about repairs and noted that he is in PDX.

Bob replied that he's just up I-5 in Sequim (not far from Seattle) and "bring 'em up" ... they spent the day in BC's garage and got drivers going again. He even autographed the pair. Friend claims same type of sound as your new Tympani's (tho they are single panel)

*the Jantzens do need to be plugged into 110v to run the HF/MF (2 way/10 inchers , passive)