Does anyone know what the 8 ohm/6 ohm impedance switch does electrically? Does it limit output power or does it present a different load to the output stages--or both? I haven't used it to switch to 6 ohms with my Infinity Quantum II's as the main speaker and have not had problems with this or the Pioneer 810 that preceeded the 1014. Does anyone else find the manual use of the MACC confusing? It is easy to set up in auto mode with the microphone and easy to manipulate these settings if you want. But, to copy these auto settings to the Custom 1/2 menu and modify them to your taste is a little confusing to me.