ifi Defender 3.0 external power source automatic switching?

[salkcin]

Hi,

 

I have a question for Ifi Defender 3.0 owners. 

 

The iDefender will use USB power from PC by default, but will block the power from PC and use external power supply (like iFi iPower) if detected.

Question is what happens if external power source is connected, but the power for the external power supply is switched off?

A. It will fallback to PC power if PC is still turned on.

B. It will power off DAC.

 

I'm curious to know since I have an USB powered DAC that is connected to a music-player PC in my living room which is always turned on, which means the DAC is also always turned on. I would like a way to power off the DAC when not used, but the PC also acts as server and needs to be powered on 24/7.

The solution I have thought of is to use an USB splitter solution so PC provides USB data, and external powersupply provides USB power within the same cable.

I want to know before purchasing the iFi iDefender. If it falls back to PC USB power when external power source is powered off, it will not solve my problem and I have to look for another solution.

 

- Nicklas

[audiobomber]

12 hours ago, salkcin said:

Hi,

 

I have a question for Ifi Defender 3.0 owners. 

 

The iDefender will use USB power from PC by default, but will block the power from PC and use external power supply (like iFi iPower) if detected.

Question is what happens if external power source is connected, but the power for the external power supply is switched off?

A. It will fallback to PC power if PC is still turned on.

B. It will power off DAC.

The answer is 

A. It will fallback to PC power if PC is still turned on.

Quote

The solution I have thought of is to use an USB splitter solution so PC provides USB data, and external powersupply provides USB power within the same cable.

 

Yes, that will work. This inexpensive Zero-Zone power supply has an illuminated on/off switch, solid construction, and will improve the sound vs. your PC:

https://www.ebay.com/itm/Finished-Zerozone-50VA-DC-LT1083-HIFI-Linear-Power-supply-50W-audio-PSU/324187931676?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

 

Why do you want to power down the DAC, does it contain vacuum tubes? If there are no tubes, most audiophiles leave the DAC powered constantly.