Standby with USB inserted

Streaming Audio
1

When my ND5XS2 goes in- and out of standby, I hear a ‘plop’ sound. But when a USB flash drive is inserted, I do not hear that ‘plop’ sound. What is the difference? Does this mean that the unit does not go into standby mode properly when a USB drive is inserted? Does it use more energy in that case, while in standby mode?

Just trying to care for the planet :slight_smile:

2

Yes, with a USB drive attached the unit does not go into standby mode in the same way. In order to keep the USB files indexed and instantly available it remains powered up, so you will not benefit from the reduced energy consumption of network standby mode.

3

Hi,

As each USB port can have 8watts drawn from it, we can’t provide this on the standby psu. The system detects when something is plugged in and is taking power from USB VBUS and keeps the main psu on.

Best

Steve

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4

Hi Steve, is this behaviour the same when plugging in an Audioquest Jitterbug?

5

Is that always the case or only when server mode is on.

A related question - is the same true for Musos?

6

I’d also like to know if the muso is affected also.

7

As always, thanks for the quick reply!

8

Hi,

Muso uses a switch mode power supply that handles standby and active mode. The extra draw in standby will be ‘foreign’ USB device consumption + losses in the psu (about 30% at those low power consumptions).

Best

Steve

9

@Stevesky Any idea how much power the ND5XS2 uses in standby if I would leave a USB stick inserted?

10

Hi @whatu1tme2b

I believe its around 10-11watts at the mains if a USB device draws low power (approx 1 watt) from the streamer.

Best

Steve``

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11

OK thanks! USB stick out to save the planet :slight_smile:

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12

In terms of watts (for the Muso 2)?

13

Re: muso2. All depends on how much the usb device draws power wise, but if the usb stick draws 1 watt, then it will be around 3.5watts at the mains in total with inefficiencies factored in.

The problem when a ‘foreign object’ is plugged into a device that must hit regulatory standby limits, it leads to a dilemma on what to do. Either:

  • cut the power to the usb device, but in the process potentially break user functionality.
  • keep power on the device, but be over the limit compliments of this user added hardware by x watts.

We’ve gone for the mindset that if the user has inserted it, they want to use it, so a user intentional action.

Best

Steve

1 Like