I just purchased a 4t, 4c, and 4bp speakers...looks like all are rated at 8ohms but the 4t's which are at 6ohms.  My receiver (Pioneer 1014tx) can choose either 6 or 8 ohms speakers, which should I choose?  

I note the nominal impedance is on these speakers is 6-8 ohms. Does this mean I need to set my receiver to 4 ohms or to 8 ohms? Why? Thanks in advance. Tom

I just received my Aperion Speakers (4-522 D's and S12 Powered Sub, still awaitning 522D VAC) and have a question surrounding speaker impedance.  The speakers are attached to my receiver - Yamaha RXV-2500, and within the GUI automated setup menu  the receiver asks to select a speaker impedance (6 or 8 ...