My new NAD T752 receiver only has inputs for the front and center channel amps. Accordingly, I will only be using these channels with the ICBM and the rears and rear center will be hooked directly to the receiver. My sub will be hooked to the ICBM.

What is the best way to set the bass management for the rears and rear center in the receiver to ensure that the bass I cut out of those channels is redirected to the sub by the ICBM? If I set them to small and subwoofer on will the receiver direct the bass to the fronts or just to sub or both.

I am worried about the bass not reaching my sub since the sub is connected to the ICBM and not the reciever.

Any help will be much appreciated.