WiiM Ultra definitely needs a balanced version, even if using TRS connectors as Topping does to save space.
And amps having both RCA and TRS accordingly.
Announcement:
https://www.blog.wiimhome.com/post/introducing-the-wiim-voice-remote-2-the-ultimate-control-for-your-audio-experience
It does not specify the Pro or Mini, are they compatible too?
Class D amplifiers need to add a filter between the output stage and the speaker connectors to minimize the switching noise that is inherent to its working.
If feedback to reduce noise and distortion is applied before the filter, it is less effective and the frequency response varies if...
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