On Fri, 22 Aug 2014 11:42:30 +0100, Eiron
wrote:

Looking for a 3-band 4th order Linkwitz-Riley crossover.
The Behringer DCX2496 looks perfect.

Anything else available that does something similar?
How about multi-channel soundcards and software?

MiniDSP?

http://www.minidsp.com/products/mini...2-x-in-8-x-out

It'll do that and a lot more.