I did my first series 6th when I was 18, and I messed the tuning up, and we were just testing a box anyways. But I figured everything out, and I've been designed them for 11 years or so now. Both 4th and both kinds of 6th orders, they both can sound very good on daily rap music. You just have to understand how each part of a series 6th changes the other parts. They are really diverse, as in, you can really make a series 6th into whatever you want it to be. There's no rules in enclosure designs, and series 6th orders can be so vastly different in performance.