I own Jamo Concert 8 main speakers and Concert Center. All 3 speakers are 4 ohms speakers. I was planning to get Denon 3802 receiver, but I read yesterday user manual that says all speakers must be above 6 ohms. Why is that ? User manual also says about dynamic power 8 ohms 140 watts, 4 ohms 210 watts, 2 ohms 240 watts. Any one has experience Denon with 4 ohms speakers ? Any other receiver suggestions... I also read Onkyo 787 owners manual and that says also that all speakers must be above 6 ohms.