Based on your
comments about how the Carver amp performed it sounded like much of your earlier trouble with a non-biamped configuration had to do with the influence of the other amp you'd been using, not any deficiency in the speaker or the amount of power being provided to it. Your fronts are active speakers - it's a very different design than the typical speaker, with the crossovers located
before the amps that power each driver. The approach used with your mains is also called active bi-amping, and it's the most effective way to bi-amp. It's also the most difficult to implement, best performed by the original designer (as was the case with your Active 40's) or someone with a great deal of knowledge about crossover circuit designs and the specific speakers in question (as was the case with the past forum regular soundhound, who I believe actually tri-amped his horn speakers with an array of tube amps). It's not essential to bi-amp the other speakers (Paradigm designed them assuming that the vast majority of users wouldn't, and any time you tweak the input level to half of the speaker it could be considered distorting the original design). Passive bi-amping (the approach you are planning on using, in which the crossovers remain in place downstream of the amps) is mainly a method of providing more power than a single amp could produce; introducing the ability to adjust high freq and low freq levels independently is more of a side-effect. That means that you could have the equivalent of a 400W amp driving your Studio CC by using two 200W amp channels, and along the way you may happen to have the ability to adjust the tweeter separately from the woofer. The level controls are often used in that case to help balance things, but you really do start messing with the designer's intent at some point.