By "full" I assume you are saying your receiver set your m80's and 180 to "large". Audyssey does not do this, but looks for the -3dB point of each speaker and reports this back to the receiver. Each manufacturer of the receiver would determine if the speaker is set to large or small. Most of them use 40hz as the cutoff, which Audyssey recommends.
Anyway, unless you don't have a sub, you want to go into the receiver setup and change each speaker that was set to "large" to "small". The crossover for the m80's and 180 could then be set to 60-80hz.
