Parasound Halo Integrated vs Yamaha AS2100

The fatigue is puzzling. I had the Halo playing Maggie 1.7I for hours always sounded great, even my classically trained musician friend would listen and express amazement at how good it sounded.

Very puzzling. It made no sense because the Halo is really quite a smooth amp, even smoother than the Yamaha. I also had Maggie 1.7is with the Halo for a while. 

I can only guess it may have had something to do with the noise floor - it always produced a low-level buzz through the speakers, something the Yamaha doesn't suffer from. I believe they claim to have lowered the noise floor with the Hint 6. 

@helomech Smooth does not mean fatigue free. I've never been able to listen to "smooth" DACs for any period of time for example. Something is just off and my brain tires. Give me any of the Chord DACs that many people find bright, but I find the timing is just right. "Smooth" DACs and amps mess with timing and wear me out.

On the other hand, I never found either my Yamaha A-S2110 or Parasound A51 to be particularly smooth. They both seem to reproduce whatever you feed them fairly neutrally with Yamaha having a tiny edge on overall detail.

You guys don’t know your audio ,the Newer 2100 series Mosfets amps are for sure warmer then the parasound halo integrated and more natural 8 hav3 head both with the same equipment, as far as build quality yamaha night and day better just look at the reviews pictures ,the Yamaha has  90% Nichicon gold tube
capacitors parts , dual 20 amp Sanken Mosfets per channel. 

You guys don’t know your audio ,the Newer 2100 series Mosfets amps are for sure warmer then the parasound halo integrated and more natural

I actually agree with you (at least the 1100 vs Halo integrated) but my experience was that the Yamahas are not warmer in the obvious sense, only that they're less fatiguing during extended listening. Yamahas have a saturated tonal palette compared to Parasound, not unlike comparing a Wharfedale speaker to a Focal, but in this analogy the Wharfedale (the Yamaha) produces more detail. 

Parasound is a meatier sound though.