Although I don't know how loud the denon 1905 will play. I have briefly turned the volume up to +4 on my denon 5803 at 117db. It will go to +17.... I'm scared to go any higher. As a side note, the Axiom setup was still clear as a bell... no distortion, spectacular.

Denon 5803 Denon 3910 Axiom M80ti's, QS8's VP150, EP500's (7.2)