There are different ways to perform a crossover with different advantages and disadvantages.
The mostly used passive crossover can be pretty expensive with good capacitors and inductors, especially when going charge coupled.
In comparison an active solution is not expensive anymore. But some do dislike the often used feedback with opamps. This can be a real issue with higher frequencies and exceptional filter characteristics.
A solution might be to use passive filters between buffers. The buffers may be discrete with high performance, but inductors are more often than not necessary. The capacitors will have lower values which show up in minimized costs. The use of electrolytics is avoided. The inductors will have a much smaller construction form but their value (in Henry) will be much higher. The latter might be a restriction as you will not find commercial offers.
The only company which I have found for suitable inductors is FASTRON:
http://www.fastrongroup.com/products...p?category=007
Costs are pretty low.
(Another possibility is to do it yourself with SIEMENS Sifferit - quite an effort)
Any thoughts or experiences?
____________
Peter