Yea I think your right david. It is peaking at 60hz
This is daily driving
Those are my max dimensions. I think that totals out to like 26 cubic feet etc. I dont know how to calculate it after I add the port and speaker displacement how many cubic feet I will be at then. That I will need help on. I will also build a box that will fit 4, 15'' woofers as I will ad one later. I hope I am not making this confusing as I am lol.