Pete--Nice system Sounds like all 6 speakers are getting a full range signal from the head unit, so you should be OK to just cut the wires to those sweet midranges and tape them off. You will lose some volume capability, but you will gain something that doesn't sound like a mad wasp making a new nest in your dash!!!

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85 M635, 89 Z1, 90 Z1, 91 850, 02 4.6is, 03 M3 Cabrio, 17 30-Jahre M3