I agree with Silvertones that this would not do any damage. If you were dealing with a speaker output, you could blow an amp, but a headphone signal should not.

And if you can use a mixer as John C. suggests, that would give you the most flexibility and safety.


BIAB 2026 Win Audiophile. Software: Fender Studio One 8, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Fender Quantom HD8 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.