Quote:
Originally Posted by Coconut
Do you know the frequency range the stock 8” bass drivers play? From the research I’ve done, BAVSOUND shows these drivers playing from 20-500hz. To me it I don’t think they go down to 20hz, they probably have a subsonic filter around 40hz. They maybe actually play up 500hz since they are pulling double duty for sub-bass and midbass. You mentioned disconnecting the 8” woofers, does that mean your sub is playing >100hz??
|
I am seeing the same thing. I did the bimmertech upgrade and the 4" woofers in the doors are incapable of playing at meaningful levels below 200hz. You need the underseat woofers to do lower midrange and midbass duty. I went with the audio tech Fischer amp with DSP and have mine crossed over somewhere around 400hz with a steep slope on the low pass and 60hz on the high pass. I also ran. 10" sealed subwoofer in trunk. Without DSP the under seat woofers have a node around 90-100hz which just sounds boomy and too much midrange presence from them drags the sound stage down and confuses the image. Not much you can do about it, still tweaking the time alignment hopefully will clean that up.