I want to setup a karaoke system with my 6.1 home theater but I don't want to risk damaging my speakers. So I plan on getting 2 separate karaoke loud speakers and a mixer. But can I set it up in such a way that I also get the karaoke music coming out of my 6.1 speaker, but just not the voice (mic input) so I don't risk blowing out my speakers?

I still want to run the music through my mixer though. Because I want to be able to adjust the key of the music. Can I find a mixer that also outputs a mic-less pre-amped output. That way I can send that output to my home theater receiver and send the normal amped output to only my 2 karaoke loud speakers?