I am currently taking an introductory course into principles of electronics and speaker ohms has me a little confused.

I have learned from class that the greater the ohm rating, the greater the resistance. So it seems a little counter intuitive to me that the M80s, with 4 ohms, would be harder to drive than say an M60 with an 8 ohm rating. I tried to ask my instructor about it and he really did not have an answer to that, either.

Speakers: Energy RC-70s, RC-LCR, RC-Rs and eD A2-300 x 2.
Receiver: Marantz 6006