Generally, any crossover made for pro applications is not going to be up to the standards of the rest of your system. Rane, Samson, Behringer etc are all made for PA and other such uses, not audiophile grade. Cheap capacitors are the main culprit, followed by the overly-complex-for-what-you-need state variable filter implementation.

Check this link out - they make what you need.

Marchand Electronics