I'm having a strange issue with volume using Wiim Pro. I filed a ticket with Wiim, but did not hear back.
Previously, I had a Mac running Roon with the USB output connected to a Topping D90LE -> Topping A90 Discrete. I was using my DCA Expanse headphones with the A90 volume set to about 65.
Now, I'm using the Wiim Pro, with the *identical* Roon setting. I have the Wiim connected to a Topping D90LE via coax (I also tried optical). The A90 needs to be at 99% and it is still not as loud as my old setup was at 65%.
So, I turned off Headroom Management in Roon and I changed the D90LE to use 5V mode. That helped a lot, but for some music, I still can't get it loud enough. I listen at pretty moderate levels.
The Wiim is configured as follows:
EQ = Off
Fixed volume output = On
Volume limit = 100%
MQA = Off
I'm not understanding why there is any volume difference between these two setups. Any ideas?