Assuming
C5 C4 C3
C2 C1
C5 - not a lot of bright top, probably tweeterless
C4 - not much difference to C5
C3 - not quite as full in the bass, some amp buzz - active?
C2 - more highs than C4 & C5, full bass too
C1 - similar highs to C2, slightly fuller bass - best balanced of the cabs