Hi again

I was going to replace the front speakers in my wife's car (E46), but I read on another board that they had to be dual coax because the Bluetooth module (which we have and use), uses one of the "cones" for the telephone output via the Bluetooth.

Does this make sense to anyone..? I have a nice set of JL speakers my kids bought her for Christmas, and I bought the adapter rings so they'll fit tight, but dont want to screw up her Bluetooth function.

Any experience or input would be greatly appreciated..

Thanks
ED in Metuchen, NJ