In Reply to: RE: Ground loop blocker posted by emailtim on February 17, 2021 at 11:23:25:
- Some DACs are entirely powered by USB drawing several hundred mA. Providing a separate 'clean' +5VDC may be beneficial.- Some DAC USB receivers are powered by USB drawing significantly less power over USB.
- Some DAC USB receivers require USB power only to enable the DAC drawing a just a few mA.
- Some DACs require no USB power at all. In these DACs the USB receiver is powered by their own internal power supply as was the case with my Ayre QB9-DSD DAC.
As such, some USB DACs may benefit from spitting out the USB +5VDC with a Y-cable while others will see no benefit at all. To test whether the DAC requires +5VDC on USB at all, you can block the +5VDC pin on the USB-A connector on one end of the USB cable as I did.
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Edits: 02/18/21 02/18/21
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Follow Ups
- And not just for ground loops - AbeCollins 05:54:49 02/18/21 (3)
- RE: And not just for ground loops - emailtim 10:49:15 02/18/21 (2)
- RE: And not just for ground loops - Ugly 15:23:38 02/18/21 (0)
- RE: And not just for ground loops - AbeCollins 11:20:11 02/18/21 (0)