I'm really curious to see what the measured response of other users systems "looks" like... I know the measured response doesn't tell the whole story and that everyone "hears" differently and all of that, but I still find it helpful to see the measured response of other peoples systems.... For whatever reason, I've found that it's pretty rare for people to post actual measurements of their systems and I'm not quite sure why that is (maybe they don't want people being critical of it?). The first thing that newer folks look for advice with is their measured response, simply because they usually don't have anything else to compare theirs to in order to see where they are at when it comes to overall response measurements.
I use rear speakers in my car (bandpassed and lower levels), but for simplciity, I'm going to start the thread by posting measurements of my front channels only. I've come to realize that when rear speakers are involved, the response of the front channels are the main thing - and they should match your curve without rear speakers playing. While rear speakers do add something, they are just "extra" and should not be included in the measurements (in my opinion). I will, however, show some example of what the rear speakers do to the response - and with different delay values (I've found that the amount of delay really changes the overall response).
Anyway, to start things off, here is the current measured response of my front channels (6x9 midbass speakers in doors,and 3.5" coaxial speakers in dash - factory speaker locations in my Dodge Challenger). I also have a small 8" under-seat sub (JBL BassPro SL). No other subs in car. Currently, I'm acoustically crossing the door/dash speakers at 400hz with 24dB LR slopes. I don't have individual speaker measurements here yet, but I will eventually post those as well, including the tuning "process" that *I* use (which I'm not claiming is even "correct" - just how I currently do it).
I measure with a UMIK-1 using REW. I use a 90-degree calibration file and hold the MIC straight up and down and move in from ear to ear and also do some figure-8's with the tip of the MIC around each ear (since I figure that my ears are never going to be in exactly the same place all of the time).
Here is the measured response of my current tune. The midbass is "exaggerated" a litte when sitting in my garage, because I've find that when I'm driving, a lot of the midbass is "masked" by road noise - so setting it to be a little higher makes things sound better while actually driving, which is the ultimate goal, IMO (at least for me).... I also have a pretty big "notch" between 2k and 5k as that stops harshness, especially at higher volumes - at least for me.
All criticism is welcome! I would love to see the measured response of other peoples systems!