Sorry to have been so late in replying but I've been a little unwell over the last few weeks.
Please find enclosed images of the rear of the "Premium" L.S. as you will see the crossover is actually part of the
L.S. which comprises of a BMW unit with the coil glued to the chassis and the capacitor soldered in.
I bought mine from the U.S. and they arrived with immaculate cabinets but with one bass/mid driver faulty.
A good tip is that the original bass/mid unit can be sourced from BMW as used in e38 7 series, swop the coil and capacitor over and voila. The coil can be removed carefully with a Stanley knife to cut through the glue and re-glued on to the fresh unit.
I happened to have a couple of spare units, one of which helped repair the "Premium" shelf speaker and the other one replaced faulty unit in my e38.