Originally Posted by
BMWCCA
I came up with a free LE175DLH decades ago and added it to my 030 system in a C37. It would ideally use a 130A but works fine with a D130 to fill a bit of the "hole" between it and the 075. Just don't expect any drastic improvement since the D130 is considered an extended-range driver already, and certainly don't expect any extension of the low-end performance.
I believe there are a couple of threads here about building a simple N7000 crossover circuit. And don't get too hung up on the 16-ohm labels on your drivers.