I have tried something like that but without the power bank.For those interested, you can transform your RU7 into an excellent desktop DAC as well as say goodbye to problems regarding power consumption on the streamer (phone/tablet/pc). In addition to this you will have a marked improvement in the audio performance of the RU7 due to the physical separation between the data and power signals implemented by the hub. The kit consists of two pieces (which you can find on Amazon) to be connected as in the photo and in this order:
1) Connect the power bank to the hub
2) Connect the hub (via the long cable) to the streamer
3) Connect the dongle to the hub in the first available position next to the cable that takes the signal from the streamer
The parts are not chosen at random, so if you use other types of hubs and power-banks, the improvement and integrity of the RU7 is not guaranteed.
Example: The hub does not carry power to the streamer so it is safe even for use with a PC/MAC and the power-bank is equipped with an internal control chip to supply power even to small equipment so it regulates the current based on the dongle's request.
I and many of my friends use it with enormous satisfaction, if you want to try it you will be very satisfied.
HUB 4 USB 60 cm:
https://www.amazon.com/Aceele-𝟏𝟎𝐆𝐛𝐩𝐬-Extender-Compatible-MacBook/dp/B0BZ471P5L/ref=sr_1_5?crid=1MMQRLZDD5I7S&keywords=aceele+usb+hub&qid=1698367218&sprefix=aceele+usb+hub+,aps,193&sr=8-5&th=1
POWERBANK:
https://www.amazon.com/INIU-Portabl...Flashlight/dp/B07YPY31FL?ref_=ast_sto_dp&th=1
The USB hub is connected to my phone, and the Jitterbug FMJ sits between the hub and RU6 on line out mode.
The preamp is XDUOO MT-601 and the amp is my Aune X7S.
This is definitely desktop audio territory.
The background is noticeably darker, like pitch black dark. Instruments separation is improved, same for soundstage and imaging.
Too bad that reviewers barely talk about the line out feature, it's the greatest thing about this dongle.
You can absolutely build your desktop setup around the RU7.