Home theater speakers: going from 6 ohms to 8 ohms.?

I bought a Yamaha home theater box set back in 2005. Recently, the receiver crapped out and I am looking to purchase a replacement. I’m probably going to buy a Yamaha RX-V461 receiver, but have one concern: my old receiver (HTR-5835) sent 6 ohms to the 5 speakers, this new one will send 8 ohms. How much of a problem, if any, will this be?

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