Nikon, I haven't heard of anyone having issues with 8 ohm QS8's and M80's up front(as I have). I'm running M80's, VP150 and QS8's which are rated at 4 ohm, 6 ohm, and 8 ohm respectively, through a mid level Denon. I know there's a few guys here with Onkyos and similar setups, and fancier. I haven't heard of any issues reg mixing ohms, but hopefully those owners can chime in at some point.

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