[Jerome Howard]

Does anyone know why cables longer than a foot, don't activate my M15? Shorter cables work. Plugged into my iPhone 15 Pro Max

I tried a 3 footer and a two footer. They won't work.

But the do with my other dongle DAC's

 

[Jerome Howard]

I can't figure it out. I have good cables. Anything over 12 inches don't work with the M15

 

[JML]

You need OTG cables. Maybe your short ones are OTG and the long ones are not?