Tuning the DRZ9255 in a 3 way with Rainbow Profi Kicks, Image Dynamics IQ10, Butler TDB-475 for the upfronts and a Diamond Audio for the Sub. I have no source for an RTA so it's tune by ear for me. Probably better this way. I'd like a bit more umph in the lower range, say upper bass/lower midrange. Question is, what are these frequencies? 250hz--500hz--1000. Where would be a good place to start.