I am considering buying this receiver, but I have a question before I purchase it. Per the manual (footnote 2 on page 20): "You can use speakers with a normal impedance between 6 Ω and 16 Ω. However, be aware that only the front speakers are set to a value between 12 Ω and 16 Ω when you select SP>AB." Does this mean that if I have SP>AB turned on, that my front speakers must be able to support 12 Ω and 16 Ω? Most speakers I have been looking at only support 4-8 Ω.