I just wanted to briefly share a discovery I made today with my Pro Plus, which I've only had for five days. I wanted to send it back tomorrow because the sound of the internal DAC was annoying and tiring me. I was looking for a DAC that wasn't annoying, even if the resolution wasn't the most modern. Then today, by chance, I tried a setting without much expectation. It fundamentally changed the sound of the Pro Plus for the better, and I'm going to keep it. I had a Node N132 for four months, but despite its great spatiality, listening to it also tired me out a lot.
So what did I change on the Pro Plus? It's the so-called volume limitation in the device settings. I reduced it from (default) 100% to 80%. Maybe it doesn't need to be reduced that much, but I only just discovered it and with 80% it is a bery noticeable change for the better. Later on one can reduce the decrease of volume. The Pro Plus was wonderful for quiet passages. But it sounds very strained with complex music and loud passages.
When the “volume limitation” is reduced, it seems that the Pro Plus no longer overloads on the digital level. Now everything sounds very inviting and spacious. It's no longer like a knife in your ear, but the opposite. It's a bit tragic because the pre-gain is at zero, e.g. for Qobuz, and that leads to overloading and distortion. Here's a quote from the Wiim forum that explains well what volume limitation does at which level:
„This depends on what input and output you use.
The voltage settings is for the analog output only (after DAC).
The pre-gains are digital and before EQ.
Volume limitation is a upper digital volume level.
If any of those are set too high, it may cause distortion. Else they don't cause any sound quality issues“
Me again.
I've been listening for hours now, and the Pro Plus sounds open, pleasant, musical, and lively, with no harshness or distortion. I think Wiim should reduce the default setting for “volume limitation.” It's like night and day.
Thanks for reading..