Do you bother to upgrade the power units themselves? iv read a bit and apparently the power source can make a big difference.
In the case of power, I went with the ifi low noise PS. I had other options, but I didn't like them based on wait time, cost and the inability to do additional research into the quality of the part. Later on, I was able to find a PSU 5v low noise from china that leverages solid components (see Talema transformer.) I bought this for my Tone2 pro, and have not been disappointed.
https://www.aliexpress.com/item/1005001612350608.html?spm=a2g0s.9042311.0.0.703b4c4dEUw02o
Strictly speaking, to me, research matters - to
@123peter 's point, I don't like overspending. The only way to resolve all concerns is to get educated. This involves slowing down, putting impatience and urges for audio awesome on the backburner, and learning the minimum theory I need to learn, and then listening to others experiences. This is the only way I know as to how to deal with the bias and simultaneously address the real want.
Notably, I bought a more expensive interconnect from Hart Audio (
https://hartaudiocables.com/collect...o-4-4mm-pentaconn-to-pentaconn-balanced-cable), which was a trusted brand, but it ended up not being sheathed properly. This decision was made on little if any research. Cable plus shipping plus duty == $50.00 CDN for what is now a useless string of copper.
Same thing with the Helm Bolt DAC, although there was little research out when I bought. Its a great DAC in terms of sound, but falls apart very easily. I bought it on a whim out of impatience and based on John Darkos review.
https://darko.audio/2020/11/helms-bolt-is-a-99-portable-dac-for-hi-res-and-spotify/
(The video that I bought into which got me drooling to buy
now, because mobile with lossless without dongle hell and chonky pocket dwelling battery laden girth (
looking at you hip-dac (still have a hip-dac btw
) == DROOOOOOL...)
https://www.head-fi.org/threads/helm-bolt-dac-amp-discussion-impressions.957279/#post-16321324 - (My real experience - scroll to top for whole article. TL;DR - nice sounding clean, neutral DAC BUT poorly put together and flimsy under normal use. (I got a replacement because the first fell apart the day I got it, the second is doing the same after a few months.))
Good brand != better.