mixing ohms-pls help

[Tattooed]

Hi,
Can you mix ohms? for example all my other speakers are 8ohms and my new center speaker is 6 ohms.

Will mxing ohms making a difference?

 

[Tattooed]

Thanks m8

 

[Tattooed]

Hi, my amp is a STRDH790. Don't know if you can change the ohms in the amp setup.