Hey everyone,

I have a question regarding my M-Audio Fast Track Pro Interface. When plugging my Headphones in the Headphone Monitor Output (all information in the manual: "max output level: -2.5dBV@THD<0.05% / 32 Ohm", "scope: 32 to 600 Ohm") the sound is clean, yet when I plug it in one of the actual outputs (symmetric TRS line outputs, output impedance 300 Ohm, max output level +10,1dBu) there is noise.

I guess that the output level of the line outputs is too high? But I am really not sure what to do with the "scope"-information. Does the headphone output adjust itself to the headphones plugged in? Mostly I am using headphones with 32 Ohm impedance and I tested another pair of headphones with 150 Ohm. Same results.

Thanks for the help

 

Sorry, didn't get that. You're plugging your headphones in the TRS output in the back?

 

That hole is not for headphones