I don't have that issue, although I do have the sub controller. EVERYONE is going to have a different opinion on how much is too much, what is muddled, & what is clear. I had the 200w Kicker sub in my '15 with no controller & it was fine, you just have to adjust factorey EQ to dial in the sound. Almost every song varies anyhow. Tjeli claims he actually tested the different taps & found the factory sub taps w/reverse phase to sound the best. I would think that'd stand true without a controller also. You can contemplate back & forth until the cows come home, Kicker does state that if you don't hook it up per instructions, you'll void your warranty. I bought mine used and wasn't worried about tapping the sub wires, it just made far more sense to me to do it that way & Tjeli confirmed it with his testing. One member said he ran all of his dipswitches on, and another said it was too much for him. I'm going to experimentwith mine & make my own judgement.