Did you use the rta method in REW to dial them in? I can only imagine your delay settings in your inukes with each sub cabinet. I had a hard time my self for a little I was 26db hot from 30-60 hz then it dropped like a rock. I finally started fresh on all 4 sub amps and dialed them in I'm flat from 13hz. to 100hz + or - 3 db. I can't wait to hear how yours sound and the method you used along with your klipsch