Not sure...futhermore, not sure how to tell. I found car audio easier to tune.
XO is adjustable, but just HPF....I can set it at 50, 80, and a bit higher. Currently set at 80. (If I had something worthwhile, I'd set it at 50 but I don't want to strain the midbass)
What tests, measurements would you suggest? My reciever does have an EQ where I can EQ specific speakers....it's a 5 band graphic, but it's still something.
The sub box does need touching up....I'll admit. I ran out of paint and got too excited and wanted to hear it. In the spring, I will probably try to refinish it. I learned that spray painting in the garage is not a good idea.