Unbalanced
Member
UPDATE: It seems that setting the gain of my Fosi V3 Monos to 25db instead of 31 makes them not turn on at random as they did before. At least they no longer do after having switched the gain settings on them. Still hooked up to my WiiM ULTRA.
I have a similar setup. Two V3 Monos fed from a WiiM Pro Plus using the RCA cable that came with the WiiM. Two separate 48V 5A power supplies. Gain on the Monos is set to 25db. All items received this past Sunday from Amazon Canada. Both units packaged in fancy printed box.
Everything works great and sounds great with the exception that one of the Monos does not enter standby. I tried reversing the RCA inputs. Same unit does not enter standby. I tried side by side placement and reverse stack order. Same unit does not enter standby.
I contacted Fosi. They asked me to disconnect the inputs and then power up the Monos to auto. They should enter standby after 20 seconds which they both do. Fosi told me to get better RCA cables.
Final test that I did was to play music and then disconnect the RCA input from the offending unit. The unit does not enter standby after 10 minutes, 20 minutes ...
I have ordered a replacement from Amazon and will be returning the offending unit.