The configuration you described is the one that's recommended by HSU for their subs, running two sets of speaker cables from a single set of binding posts on the amp, one set to your main speaker and the other to your sub.
They advised me that the cables to the sub don't need to be of the same gauge and quality as the main cables since the sub is drawing a small current signal from the amp, then using its own amplifer to boost that signal.
I've found it easier to integrate the sub using that configuration than going from pre-amp outputs to the low-level inputs on the sub.
They advised me that the cables to the sub don't need to be of the same gauge and quality as the main cables since the sub is drawing a small current signal from the amp, then using its own amplifer to boost that signal.
I've found it easier to integrate the sub using that configuration than going from pre-amp outputs to the low-level inputs on the sub.