Just received the wiim amp ultra and was surprised by the difference in sound compared to the wiim amp pro. Particularly, my bookshelf speakers sound brighter. I found this much preferable at lower volume. The sound is more crisp and detailed at lower volume whereas the wiim amp pro just sounds somewhat muted at lower volume. Even more surprising, I found I prefer the sound of the wiim amp pro at higher volume. It seems to maintain more bass and midrange compared to the wiim amp ultra which seems to overemphasize treble at higher volume. I am not sure whether this is due to some inherent property of my speakers or if it's strictly the amp changing the frequency response. I had assumed the wiim amp ultra would offer a more accurate response from my speakers.
Other things I noticed, I like the volume knob better on the pro. It feels heftier and turns smoother. Also for some reason, the ultra detects my wifi but will not connect to it unless I place it right next to the router. The pro didn't have this problem, nor has any other device I have used. Not sure if this is due to a defect or model design.
Other things I noticed, I like the volume knob better on the pro. It feels heftier and turns smoother. Also for some reason, the ultra detects my wifi but will not connect to it unless I place it right next to the router. The pro didn't have this problem, nor has any other device I have used. Not sure if this is due to a defect or model design.
