but I could be wrong and I apologize in advance if so. Speakers can be bi-amped, tri-amped, etc. It is usually done for concerts and big events where many speakers are used. The clip that you refer to is normally left on when you do NOT want to biamp. If you want to biamp you take the clip off. This way you can hook up one amp channel to the woofer, one amp channel to the mid, and one amp channel to the woofer. For a stereo setup such as this you would need 6 mono amps or 3 dual channel amps. From the above you can see that each amp channel would have to be set to the appropriate level since you could have different signal levels coming in from the different amps. The same thing goes for active crossovers. For stereo you need six amps for a three way. As you can see if can get expensive fast. For most commercial uses, I would stick with regular wiring.

Paul