How does your denon compare to your emotiva in terms of sq and volume control?
Yea the noise floor on my newer yamaha rx-v373 is VERY low, no noise no hiss even at very low volumes. I almost as much play in the volume knob as i do with speakers hooked up, so more than enough to listen at very low levels.
As a matter of fact I CAN HOOK UP MY JH13'S TO THE SPEAKER TAP ADAPTER AND STILL GET CONSIDERABLE VOLUME CONTROL!! but the hiss was loud and annoying. I know, to even try was crazy. BUT to all of those who say that speaker amps will blow hps, quit breaking the cardinal rule of head-fi by commenting on things you havent heard/tried. Not that i am recommending IEM's to speaker taps. I would actually advise against it. Doesn't add any benefits, hiss is loud, and different amps act differently and have different power outputs. Pops or other loud noises could potentialy blow some ear drums and cause considerable hearing damage with the wrong amp.
Headphones on the other hand, my 150ohm hd700's handle my avr's power just fine straight off the speaker taps.
But with my full size hp's my 90's onkyo avr has considerable hiss and noise, where the yamaha doesn't have any.