I have a new Komplete audio 6 audio interface.
Outputs 1 and 2 go to my speakerrs. Outputs 3 and 4 go to my headphone amp.
The speakers on outputs 1 and 2 work.
But there is no sound at all from outputs 3 and 4 connected into the headphone amp (brand new amp). The headphones are connected into the headphone amp.