JBL 3152/3182 crossovers

Are these crossovers designed to power two 16 ohm LF units?

I just got a pair of 3152s and it sure does look that way,
with the two sets of LF taps being there and all...


Seems like it would be pretty straight forward to change one to another, just swap out the components for the value in the other's crossover schematic, right?

:)

3152
http://www.jblproservice.com/pdf/Net...%20Network.pdf

3182
http://www.jblproservice.com/pdf/Net...%20Network.pdf

It seems the old service manuals website does not exist anymore. It's sad.
I'm looking for the schematic of the 3152 network (or crossover).
Can anyone help ? where can the various crossover schematics and service manuals of vintage equipment be consulted nowadays ?