Usefullness of a external quality power (linear PSU or Battery) for USB Pci card (SOTM, PPA,...) for use with an Asynchronous, completely 5V decoupled DAC ?

[malarz]

Hi everybody,

 

I am questioning myself of usefullness of a external quality power (linear PSU or Battery) for USB Pci card (SOTM, PPA,...) for use with an Asynchronous, completely 5V decoupled DAC ?

 

Thanks for your opinions.

 

Have a nice day.

[malarz]

Hi,

In fact my question is as follows:

The USB audio cards PCI (SOTM, PPA, ...) are equiped with an extra external power supply input for quality power (linear PSU or Battery) instead the primary power from PC, is this external power designed ONLY for supplying quality 5V for devices plugged into this card (and which need this 5V) OR it improves ALSO the performance of this USB audio card (output data signal for DAC , ...) ?

I am asking that, because I have an Asynchronous DAC that don't need the 5V power and is reclocking itself the incoming signal, so maybe (for me) buying the expensive extra external power supply for my SOTM Tx-USBexp card is wastefulness ?

 

Thanks for your opinions.

 

Nice day everybody.

 

[malarz]

Thanks a lot.

 

I suppose it' should be the same for my SOTM Tx-USBexp card ?

[malarz]

Thanks a lot Pepsican