Power Supply for Topping E30

[Lgvln]

Is anyone else getting noise from external PSUs?

I tried using Apple’s 5V/1A and 5V/2.4A power supply and they both introduced electrical noise (similar to those beeping/56K modem-like noise you get from the onboard sound cards).
Apple power supplies are one of the best around (noises linearity etc) so…
There wasn’t this issue when using my Mac’s USB port for power.

The E30 is connected directly to my nCore power amp. Could that be playing a part?

 

[JamesYeomans]

Is anyone else getting noise from external PSUs?

I tried using Apple’s 5V/1A and 5V/2.4A power supply and they both introduced electrical noise (similar to those beeping/56K modem-like noise you get from the onboard sound cards).
Apple power supplies are one of the best around (noises linearity etc) so…
There wasn’t this issue when using my Mac’s USB port for power.

The E30 is connected directly to my nCore power amp. Could that be playing a part?

Wondering if that might be a ground loop…

 

[Lgvln]

Wondering if that might be a ground loop…

I would say no. It’s an beeping (56k modem like) electrical noise instead of a constant hum

 

[Dunring]

I just got an E30/L30 stack and tried the USB port on the side of the monitor (which goes into a highly overclocked computer), and into a battery UPS with a good Samsung 1.5a charger, and also using a 10,000ma power brick which cost $10 and can charge and provide power at the same time. Easily I'm sticking with the power brick plugged into the 2 amp / 5 volt plug it has. Sitting on the desk away from all interference and sound so good compared to the other options. Plus if the power goes out it'll be fully charged to keep the phone going

Forgot to mention the feature on a power bank that provides power while charging is called "pass-through charging" if you shop for one with that feature.

 

[Erispedia]

My E30 is kind of weird. Or did I do something wrong?

- E30 data cable plugged to monitor, monitor USB cable plugged to laptop, E30 DC 5V cable plugged to monitor = POWER ON
- E30 data cable plugged to monitor, monitor USB cable unplugged, E30 DC 5V cable plugged to laptop = POWER ON
- E30 data cable unplugged, E30 DC 5V cable plugged to laptop = NO POWER
- E30 data cable plugged to monitor, monitor USB cable plugged to laptop, E30 DC 5V cable plugged to iPhone/iPad/Wall charger = NO POWER

Can someone enlighten me?

 

[MrOtto]

Good info here, you can sort by noise, low to high:

Index of tested and reviewed USB power supplies/chargers

 

[theREALdotnet]

(sorry for the thread revival)

Just to clarify, the E30 will not take power from the USB input socket (even if the source device provides enough power) and must be powered via the barrel connector socket, correct?

EDIT: Found the answer in the E30 review thread, the above is correct.

 

[lewis]

I think this is incorrect and it should take power and signal from the laptop.
Just using one cable.

 

[Saponetto]

No.
E30 needs to be powered via the 5VDC barrel connector socket, it can't be fed via the USB line.

 

[lewis]

Thanks for the reply. I will give up and get something else.
Lewis.

 

[theREALdotnet]

The Topping D10 is USB bus powered. It doesn’t have a separate power socket. Maybe that’s an option.