I’m new to cab-amp setups. Used large combos for years. Can someone please clarify: So the PF800 says it’s to be used in “parallel.” That simply means I must have a cable directly from the amp for each of the 115 cabs, correct? I cannot do “amp—>cab1–>cab2,” right? I have to do “amp—>cab1 and amp—>cab2” only? Thanks!