I managed to do some more tuning today, with some positive steps forward. However, it has opened up a few new questions for me to learn the answers to. First, I managed to figure out my sub crossover issue.....sort of. I can now get my box to play to 80hz-ish and can flatten it out with some serious EQ. It seems my desire to be a basshead with a SQ front end is proving to be a major challenge. LOL. My based up house curve was essentially giving me a 60hz crossover due to being so freaking loud - and trying to get down to +6 db @ 80hz and 0db @ 200hz. Tuning to that curve was simply not letting my sub stretch that far, that loud.
So I have changed my curve a little bit and got a nicer slope from sub to woofs, not great, but better. Lessons learned! I have noticed however, that my response from 200-2000 seems to be identical, despite fresh tunes with different crossover points. I know that there is still some room for improvement on the overall tune, but I'm noticing the same cancellation/deconstruction spots at 220 and 345 as well as that trough from 600-800 (this is less of a worry).
So my questions are: Is it possible to tell what is causing this cancellation? Is it install related? Is it equipment related? Is it crossover/tune related? Or is it just something I have to live with? Comb filtering?
In theory, would sealed boxes in the doors eliminate this with a more predictable response? Or would it be same shit different pile?
Attachment 8478
This is my tune#3 (blue) and my tune#4, with the newer curve (red). My passenger and driver sides show a very flat response in these areas, when played by them selves, but as soon as I sum the two sides, I get the above graphs. So please let me know what you think. You won't hurt my feelings, so be brutal. :fear: