Yes, the 33xx is the lowest with pre-outs.

I'm sure we all have heard more that we ever wanted to hear about 4 ohm speaker loads on AVRs. I know that the consensus is that any Denon AVR especially mid-lineup+ will drive M80s comfortably beyond normal listening levels.

Here is one data point that would support a different opinion http://www.hometheaterhifi.com/recei...-receiver.html. In this review with a full bench test of the 3310, the author specifically advises against using it with 4 ohm speakers. It appears that the recommendation is based on THD.

If I am interpreting it correctly, it may indicate that although it will work and not necessarily cause damage, the audio quality may suffer?

Thoughts?