interesting you mention this. i bought the imagines as a means to add warmth and midbass vs. the Focal V30s- which I were not happy with. my ears told me it was a successful effort yet with additional mechanical work required to manage the overabundance of bass at certain frequencies, i.e. the small enclosure effect. i really believe this set was designed for a plug and play upgrade to add decent bass to stock, untreated, unsealed doors.
just yesterday i ran individual RTA sweeps of evey driver in my car to try and optimize the crossover settings. thanks to hanatsu and wesayso for this suggestion.
the attached pic shows the imagines (front door, blue curve) and the focal V30 (rear door, green curve). each are HP crossed at 80 Hz 24db, no EQ.
you can see that the HATs are +3db @ 100 Hz and +5db @ 80 Hz vs. the V30s. that is a significant measured improvement. also note the huge peak of the HATs from 200 Hz to 350 Hz. This is the bloated bass issue i have to contend with and my tune EQ settings bear this out. this was worse when the doors were rigidly sealed. If i had time i would love to open one of the sealed holes in the door and see what that does to the F/R. bottom line, the HATs were worth it but not without some added difficulty in my install.
with respect to the midrange output, i believe the pioneer autoEQ had the effect of boosting the output of the imagines at frequencies from 1 to 5 Khz. they are absolutely clean and up front within this range.
however, after measuring the output of each driver, the ultimate crossover point in my install (i.e. the point where the F/R starts falling off naturally) is right on the money between 1Khz and 1.5Khz. I will run my new tune crossed at 1.2Khz between the midwoofer and midrange.
the reason my previous tune had laid back vocals was because the L3SE starts falling off below 1.2 Khz and they were crossed at 800 Hz, thus the hole in the sound. See second pic for the L3SE curve (magenta) overlaid with the imagine's.
This is fun stuff and I am anxious to apply the new settings today.
Another experiment that I did, I thought up due to a comment I heard from a member on one of these forums. He said that all rta programs essentially suck on pc's because windows screws with the responses. I don't know how much truth is behind this but I wanted to kind of test that theory. I decided to grab my pink noise cd (exact same one I use in car) and threw it in my blue ray player and took a reading on my home stereo. I did this because it is the best sounding setup I have access to and I am always impressed by the response of it. It is a fairly hi line Denon and has had Audessey set on it to give it that nice sound. Low and behold, the stupid rta was showing the exact same peak at 2 kHz and 5 kHz and the dip at 63 Hz was even larger than in the bloody car! Anyways, I saved the response and used it as kind of a template (target curve) for the car. I did add in a fair amount more from about 300 Hz down as the small space I think requires that. End result: Best it had ever sounded! I sat with it for about 30 mins the next day, doing small tweaks mostly in the 1 kHz and midbass areas and it truly sounds quite nice to me. Just thought I would share this as it might help out some other guys or provide some feedback from some guys more knowledgeable than I.