Quote:
Originally Posted by low_bass_makker 
I dont think so because the Midrange and tweeter are working with there passive networks and not Active.
I addition to this If you are interested in knowing today again I and zuchero singh did one test. I boosted the 8 khz eq in the HU and the soundstage was higher when compared to flat setting. What caused it maybe you can tell us.
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If you are running passives then the crossover point is 5.5KHz not 7KHz.
So a peak or dip at "7KHz" has more to do with tweeter and its placement could very well be the result of reflections because of glass area.
The sound stage is more dependent on drivers, locations, phase, slopes than equalizer.
You can improve imaging by equalizer as it makes the reproduction more linear by eradicating peaks or dips in frequency spectrum.
All I want to say that the peak or dip at "7KHz" alone cannot affect the sound stage enough to notice so easily. Moreover the cause of this variation has more to do with the speakers and car acoustics than CD player.