On December 27, 2016 at 09:22, highfigh said...
Or, it was found accidentally.
This^^^
There's no reason to think that you could not set up an AVR with the headphones plugged in. However, there's even less than zero reason to plug headphones into an AVR while setting it up.
The acronym RTFM exists for a reason. Still not sure why he referred to himself in the third person, though.
Probably embarrassment.
