could the colors on the speaker cones have changed (yellowed) with time? some speaker cones are paper,and that can happen to them. if so, it might even out over time.
~ 2OO8 E90 M3 /// INTERLAGOS BLUE w/BAMBOO BEIGE, CARBON LEATHER / 6MT / 19" 220M FORGED WHEELS / PREMIUM / MOONROOF / IPOD / BSW SPEAKERS ~
~EVERYTHING IN MODERATION,INCLUDING MODERATION ~