no offense taked, but how is it weird? You have drivers that are at "different frequencies" as you state. Why would you not drive them accordingly. The design is much revealed by many, and after my listening, I concur. The amp is a sunfire 600x2 2 channel amp. check it out. My ears don't lie..........to me at least - LOL

Sunfire amps & processor Sammy 50" Crown amp 2-SVS SS Maple Ultras, Axiom 60s,22s,150cc, QS8s