Axiom Home Page Forums General Discussion Technical Questions Problem with my H/K receiver

You will not damage your 805, and I recommend not setting the impedance to 6 ohm. That will only limit the current available, which is more likely to damage things.

If you push it too hard with the M80s (and I'm guessing that would be pretty hard with an 805), it will simply shut down. You'll know if you do it... and you most likely will not damage anything.