[Motown65]

jbl curve should be fine. Im not sure if its any different than the audiofrog curve. I dont really know anything about biquads but i feel the sub having 12db slopes is messing with phase also the crossover overlaps. with me i do lr4 at 80hz to keep phase coherent and then adjust eq to match target without adding. Have you reviewed the audiofrog faqs. Honestly Andy knows it so I follow his teachings lol