Powering DAC with battery?

[Artzox]

Hi guys,

I did some testing and my power supply/power is noisy. The switching power supply is rated 9V at 5A.
I have a 26,000 mAh anker power blank which is much quieter but can supply 2A at 9V.
The DAC works fine but I assume it is not so simple as it is not getting enough power.
Are there any dangers from using it like this?
Thanks!

 

[abdo123]

Your power supply is what?

 

[abdo123]

If you’re experiencing ground loops then use balanced connections or the optical TOSLINK input

 

[Artzox]

No ground loops, and really noise is not audible when listening to music, it is heard when you boost the volume of the amp and nothing is playing.
I cannot use neither balanced nor Toslink but thanks for the suggestion.

 

[abdo123]

And this battery solution is fixing the issue?

 

[Sokel]

What kind of dac needs 5A PS?

 

[Artzox]

Tempotec Serenade idsd
and yes - the battery is removing any noise. I boost the volume of the DAC and Amp to max and there is no noise whatsoever.

 

[MAB]

Can you tell us you DAC and powersupply models?
I am looking at specs for DACs I have, 830mA (430mA at idle) is the highest I have, and it includes a powerful headphone amp and DSP.

A 2A max battery would be more than enough for the DACs I own, and worst-case would last for ~30 hours at maximum with your battery’s capacity.

 

[Artzox]

Can you tell us you DAC and powersupply models?
I am looking at specs for DACs I have, 830mA (430mA at idle) is the highest I have, and it includes a powerful headphone amp and DSP.

A 2A max battery would be more than enough, and would last for ~30 hours at maximum with your battery’s capacity.

Just checked actually.
As I bought it used I assumed that everything was original inside, but I just checked a review and the snapshot is showing 9V 2A
So we may close this thread.

https://hiendportable.com/wp-content/uploads/2019/09/Serenade-09_resize.jpg