Good questions. The seller is on holiday now, so I can't contact him. The speakers are sunk into the baffle, and the crossover is biwirable, where the first set of terminals is driving low and mid, and the second set is driving only the tweeter. Strange..... The Morel is s rather big dome, I'd say 28 mm, and things aren't helped by my silver VD Hul loudspeakercable (which I will replace) and the rather hard acoustics of my listening room, which I'm not willing to change (hey! I gotta live there.....), although it sure helps if I close the curtains. Another solution might be to add a resistor, something like 1 ohm, 5 watts in te positive cable to the tweeter. But I'm fooling around with them, and it's fun. And, even in this set up (where the NAD is also notorious for its top-end), the strenghts outnumber the flaws, so I could live with it.