active 4345's

[gasfan]

That's exactly what it is; active uses active components, IC's to boost the level and to amplify, and the passive uses the standard DAC outputs. Active has got volume-control with IR remote control operation. What is it you need? volume control? in this case you need the active.

Okay. The Behringer is an active crossover to start with. Does the passive upgrade change this?

[Serum]

No, it still is an active crossover, even with the passive output-stage.