JohnSwenson wrote: 
> The SBT provides the standard 5V USB voltage so there is no problem
> here. I think you have a misunderstanding of current, the LOAD (your DAC
> in this case) determines the amount of current that flows over the
> connection. The source cannot "force" more current  into it than it
> wants to take. The SBT will supply up to 500mA and your DAC takes less
> than 500mA so all is fine. If your DAC took more than 500mA THEN you
> would  have a problem, but since the DAC takes less than 500 and the SBT
> can supply up to 500 all is good.
> 
> EDO works best if the DAC is plugged in and powered up before the SBT is
> plugged in to a power source. There is no harm if it is not, it just
> might not connect properly to the SBT. There is no harm to anything by
> just unplugging the USB DAC anytime you want. 
> 
> If you want to switch to a different output of the SBT (say S/PDIF or
> analog) it is best to do so while the USB DAC is still connected. If you
> unplug the USB DAC THEN try and switch to a different output, the SBT is
> going to be complaining about not being connected to the USB DAC. It's
> best to switch first, that way you don't have to worry about the SBT
> trying to connect to a DAC that isn't there. 
> 
> John S.


Thank you John for your valued advice, cheers.


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