Historically Denon's have shown to have very robust amp sections which is why they are so popular(esp with 4 ohm speakers), however, their have been some concerns brought up reg'ing some of their new amps not being as strong as some of their previous ones. This was brought up a few weeks ago with one of the mid-level Denons which was tested recently...I'm not sure which thread it was brought up in, maybe someone remembers where it is. Used within it's limits, the 1911 *SHOULD be fine, however.
Half of communication is listening. You can't listen with your mouth.