I haven’t tried a different power cord with my Lumin U2 Mini- still using what was supplied by the manufacturer. There is a difference between the U1 and U2 Mini’s when it comes to their power supplies so I would imagine upgrading a U1 would offer more potential as opposed to using the supplied wall wart.
STREAMER
Does a after market power cable make a difference on a streamer like lumin U2 mini or U1 mini