I have Norh 9.0s actively bi-amped with active crossovers. This was allowed for by a specific design by the manufacturer.

They originally had passive crossovers in them but had extra posts for active biamping. I had to open them up and rearrange the wiring to 2 posts per driver.

This setup is for my 2-channel listening and I can really hear a difference. But remember each driver is getting its own 100w amp! And the crossover points are set for optimum performance of these particular drivers.

In the near future I will triamp with a 3-way active XO and bring in a set of sub woofers.

I am going to all this trouble and expense for 2-channel, and HT will get some benefit from it. Not sure I would do this if I didn't have high end audio sources, and especially for just DVDs. I am not convinced that the DVDs that we have are of high enough audio quality (compression and all that).