Still something to do with cars right, car audio!
Anyway, mid bass without tweeters should give you something like
what you keep hearing from those bass-rich system from outside the
car. All bass and nothing else. But note that installing mid-bass
without a proper filter might demage the speakers as they are not
meant to play high freq sound.
Layman, just lower your treble setting to minimum and bass to max
and play your songs, it should sound something like that. And ya,
also there might be a lack from surround effect from some songs
that utilise different freq and balance to circulate the sound.
