I didn't know it was doing that much damage to the vehicle itself. I wish I could listen to this one, for sure.
I've found that to be true with properly designed series 6th order bandpasses. They do truly excel in some situations. People think that because it's a 6th order that it's going to peak super hard and roll off super hard, but that just really isn't the case, if it's designed for music. I would almost argue that series 6th orders might be better than ported, as in play a wider bandwidth at a higher SPL level, at least in situations like these. I wish I could do a series 6th order vs ported box test in a pickup truck, where I could make the best of both types of boxes and actually show SPL across the bandwidth to see what it truly does look like.