tdehan Posted September 1, 2020 Share Posted September 1, 2020 I am using the Behringer U-Phoria UMC4040HD Digital Audio Interface with Bandlab Cakewalk. The Behringer U-Phoria UMC4040HD comes with a power supply however, everything with the Behringer U-Phoria UMC4040HD seems to work just fine only with the power it receives from the USB connection to my computer without the power supply plugged in. Is there a benefit I am missing by not using the power supply for my audio digital interface? Link to comment Share on other sites More sharing options...
Glenn Stanton Posted September 1, 2020 Share Posted September 1, 2020 USB connects are generally limited to a max of 500ma @ 5v - so using the power supply ensures full voltage and current to the electronics - pre-amps, converters, phantom power, etc can take more power than a USB connection provides (unless using the full-on PC USB 3 connectors... which requires the USB on your I/O to use it) and as a result, you may encounter additional audio distortion and perhaps jitter in the converters. may be subtle, may not be. on the larger units (i have the 1820) i definitely only run it on the power supply. 1 Link to comment Share on other sites More sharing options...
tdehan Posted September 2, 2020 Author Share Posted September 2, 2020 Thanks for the explanation! Link to comment Share on other sites More sharing options...
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