I recently purchased a FIIO K11 R2R and I have to admit I really enjoy the sound of the DAC section. I use it with my Topping A70 Pro. I’m just curious if I can get any more from the little guy by feeding it some cleaner power?
Has anyone tried the iFi iPower2? I’ve never tried an upgraded power supply on any other equipment before and would like to know if it’s worth it or is it just Snake oil?
Any information would be greatly appreciated 
iFi sell an incredible amount of overpriced snakeoil products. Without seeing someone actually testing your specific device using it with actual measured results showing a positive difference, you should save your money.
I use a Cyberpower 1500w sine wave power UPS which is really good for electronics as well constant power. This has a USB C and A port, and I put some UL listed 1ft extender cables to be able to use all the plugs, even with large wall wart of plug that usually takes up two spots. As good as it gets. The replacement battery is $48 and had this a few years and still works great. Power doesn’t get cleaner.
I got an I power X and every device I tried it with was the same or worse than just using power over USB