Noisy right channel

I have switched cables right to left and the noise switches to the left speaker with the cable change.
Is it the Ultra RCA cable you have switched? And do you hear the same noise regardless of input or source?

If so, I guess it is an Ultra issue, so try unplugging the Ultra's power cable and leaving it unplugged for a while before switching it back on.

If the issue not solve, Please submit a ticket via the feedback section of the WiiM app.
(WiiM app -> More -> Feedback)

Your device logs are sent to help resolve issues.
 
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