The original ProAc Response D15 crossover, midbass = SEAS W17EX-001 (not available).

I modified this crossover for Johnny who had build the D15
"clone" and I was positively surprised by the good sound from these drivers - even the 8513!

Modified crossover for W17EX001.
All coils should be below 0.3 ohm.
This crossover is quite similar to the 2.5 clone!
Drivers are available from:

Cabinet:
Use the TJL cabinet. Vent = 72 ID x 200 mm or 67 (ID) x 170 mm.
The TJL cabs were modelled after the D15.