Thanks for all the input, I find it reassuring.

My room is 1500 cubic feet, to be more specific. I also cannot use very high volumes since I am in an apartment building.

Now, I noticed that the 1804 specs state: 90 W pc (8 ohms, 20 Hz-20 kHz, <.08%THD) and 125 W pc (6 ohms, 1 kHz, <.7%THD). I think it's similar if not the same for the 1911.

Does this mean that the receiver will deliver more power at lower ohms? Is this done automatically?