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USB related question

post #1 of 3
3/18/10 at 8:03pm
Thread Starter 
I'll start with the question:
Is it possible to add a separate power supply to a USB powered device?

I've narrowed my choices to two DACs, both USB powered (via B type usb connector).
I'm thinking about :
- bypassing the power pins on the cable connectors
- mounting an input connector, wired straight to the dac's PCB

Main question is:
Would a separate, well regulated, 5V power supply bring some benefits to the performance?
From what I've read USB power is not the cleanest .
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post #2 of 3
3/18/10 at 8:26pm
Depending upon the USB chip, it may have a requirement to see the USB power to detect that it is attached to the host so you'll have to check to see what chip is being used.
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post #3 of 3
3/18/10 at 8:32pm
It's possible. As for whether this is worth it is another story altogether. My opinion is that if you're willing to do that, just get a better DAC.
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