Can I set the headphone and line outputs to different levels? Chris February 23, 2021 02:01 Updated Yes - you can set different output levels either with Duet's multi-function encoder knob or in Maestro. Related articles Symphony I/O: Setting Speaker and Headphone Output Levels What is the impedance of Duet (FireWire) headphone output? Duet (FireWire) vs. Duet 2 (USB) One/Duet/Quartet does not pass audio after cold boot on Windows 10 Power Supply Information: Duet 2 Comments 0 comments Article is closed for comments.