HiFi uses a 0dBFS reference level of 4v balanced / 2v single ended whilst the Pro uses a reference level of +20dBu balanced / +12dBv single ended.
Further question: And, will we be able to use both RCA and XLR at the same time?
Answer: Yes.
Further question: What is the switch from the front panel?
Answer: The front panel gain switch is for headphone use.
In “0dB” gain the 0dBFS headphone output level is 1.13v balanced and 0.56v single-ended.
With 9dB gain the 0dBFS headphone output level is 3.2v balanced and 1.6v single-ended.
With 18dB gain the 0dBFS headphone output level is 9v balanced and 4.5v single-ended.
When a headphone is connected, the line outs are muted.
