The flexibility of the ICBM is one of the attractions. My receiver has a 100hz crossover point for the small setting, which is too high. My mains are somewhere between a typical bookshelf and a floorstanding speaker in bass response with on axis response to 59hz and extension to 34hz. The receiver places me in the dilema of either losing bass or not using my speakers to their full potential. Even my center and surrounds have on axis response down to 70, which would make an 80hz crossover ideal. The 5-channel inputs aren't the only place I lose bass managment either. When I use the Direct Analog mode, I lose crossover to the sub along with the rest of the signal processing. An ICBM would allow me to set a 60hz crossover on my mains and a 75hz crossover on my center and rears that would always be in effect. I find that idea very appealing.