Help! 8 ohm L/R fronts paired with a 4 ohm center

[jvc]

Does your Denon receiver have the option in it's setup menus, to set it to 4 ohm? If so, do that, and you should be ok. If not, you should still be ok, as long as you don't listen at loud volumes, for extended periods. 4 ohm speakers, with an 8 ohm receiver, can possibly cause it to run hot, go into "Protect" mode, and shut down.

My front three speakers are 4ohm, and the other four are 8 ohm. But my Onkyo receiver has the option to set it to 4 ohm. It said in the manual: If any speaker is 4ohm, set the receiver to 4 ohm. I set it to 4 ohm, and have had no problems, even at loud volumes.

Your center speaker isn't really a match for your other speakers, even though it's the same brand. They need to timbre match. In order to timbre match, they need to be from the same series, as well as the same brand. You really should return it, and get one from the same series.
Good luck!

[Hyfi]

I'm doing it the opposite way. My HK Receiver is rated at 8ohm and does not give a spec for 4ohms in documentation. My center is 8ohm but my rears are Dynaudio 42s at 4ohm and my fronts are the 82s at 4ohms. I do run the fronts through my main 2 ch setup via the pre outs for the fronts.

If your HT receiver does not have any outo sound setup, the worst thing that may happen is you will actually be able to hear the dialog over the background sounds because it will play louder at the same output wattage(becuse it close to doubles as you half the ohms). You also have to be sure that your receiver can handle a 4ohm load but I doubt a center would cause too much problem.

Just let your setup or meter set the volumes correct and you will be fine.