The Emotiva will give you about twice as much power as your Denon which will give you a whopping 3dB increase. If you try hard enough, you can convince yourself that you can hear a 3dB increase at louder SPLs (~80dB). Remember that a 10dB increase sounds twice as loud to your ears...a long way off from 3dB .

Of course as JohnK will tell you, the toroidal transformers in the Emotiva amps will result in a wider, deeper, taller soundstage, enhanced imaging and clarity beyond your wildest imagination .