A lot of it's the software. But I tuned in stages for my house curve. Did the front woofers as a pair. Then the center channel. Then the rear doors, and the rear mid ranges near the cargo. I have yet to EQ the subwoofer. But you know.... This is a suuuuuuuuuper timely process. Many of the folks on DIY Mobile Audio spends weeks, months, etc. to get perfect their own curve. Look up the JBL curve! That's where I started. A lil heavier on the bass side, but if you can get your 250 hz to 1k hz flat, that's a great starting point! At 3k, I'm targeting -3db and at 5k back to flat. So far I like it. I prefer more pronounced vocal ranges though. Center channel is at +2db and it provides really good staging so far. I am using centerpoint though, as the treble ranges seem clearer than without.
This is like a lil date with my car every morning and lunch. xD Wasting a lot of gas idling.