I own a Jack 12, and there is no way in hell a 12/6 gets as loud without a 6nd410 midrange and adjustable padding (e.g. an active crossover or a switch). But, you're right, it gives up evenness to achieve that.
Per the above, I clarified my rather unclear writing in my original post (I thought the impedance description would make which cab I was talking about clear). We are saying the exact same thing (for once
