You're welcome.

I've not used one, but this has all the bells and whistles;

BEHRINGER: DCX2496

Pretty popular among DIYers, just verify it'll do stereo 3-way.

The beauty is in the flexibility. Build a passive for that system and that's all it's good for. Considering how most of us are forever tweaking, I'd rather do it with software than a soldering gun and mail-order parts.