@upstateaudiophile you should definitely consider using ARC to tune your subs. I would be talking to both Wilson and ML to get advice on the crossover parameters you are asking about.
SabrinaX Sub-Crossover
First time posting. I recently got a new pair of SabrinaX speakers and paired them with two Martin Logan 1100x subs. The system together sounds incredible. The SabrinaX is rated down to 31Hz. Where should I cross-over the subs? I did it at 35Hz with a steep roll-off (4th order) but wondering if people with more knowledge have any recommendations?
Thanks!