Alright found out some information about my preamp and the bi-amp mode it has.
It’s pretty neat when turned on.
Within the preamp (setup in the setup menu) and before the amp, the preamp sends out each channel as a high and low signal (two channels for each speaker and a total of four channels for two HF & two LF signals). When connected properly the LF channel doesn’t receive a HF signal and vice versa.
What Marantz does is separates the one channel for just low frequencies sent out and another separate channel for just the high frequencies. 👍🏻