You might be confusing the analog 80 Hz (only) crossover, only applicable to the 5.1 analog inputs (switch on the back), with the software config crossovers, which have nothing to do with the 5.1 analog inputs, and everything to do with CD and DVD sources brought in digitally, and 2 channel inputs (except for bypass mode). ??

(Sorry about that sentence! )

In one sense you are correct: double bass with the analog crossover turned off, or no double bass but with the switch on. Just for the 5.1 analog inputs though.