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I connect my headphones to a focusrite scarlett 18i8 3rd gen audio interface...should i use a separate amp as well? can i even do that, use both amps? should the focusrite be enough?

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JohNovation
0
Aug 2, 2021
Having checked the specs, there's certainly nothing to suggest that an additional headphone amp is required here. Scarlett is designed for use with professional headphones. As it is main's powered rather than relying on USB/Bus-power, Scarlett 18i8 can comfortably drive headphones with an impedance of 250 ohms. These appear to have an impedance of just 23 ohms.
Michael-Q
232
Aug 1, 2021
Probably , Yes, and maybe. All in one interface stuff usually doesn't focus on the headphone output. I'd try it without an amp for a while. If you notice anything strange as you increase the volume, buying a dedicated amp will help. The hard part is sometimes you may not notice anything is wrong until you listen through a proper amp. There might be a better way to wire it up as I'm not familiar with the scarlett stuff. I think all you'd need is a 1/4 inch trs to rca cable. The 1/4" trs end goes into the headphone jack of the scarlett and the rca's go to into the amp. Your headphones then connect to the amp. Some amps don't use RCA's for input so you might need a 1/4 inch trs to 'something else' cable.