Just to be sure and settle things down, could someone with the official passive network, either from speaker exchange or from inside an original M2, please tell us the real values of the two caps?
Is it C1=4.7uF and C2=3.3uF ?
This is of real importance for anyone expecting to clone the M2, as a 209Hz or 1kHz pole makes a huge difference for the resulting crossover, and could even damage the driver on high output...
Thanks