Welp...the Lavaudio DS400 lasted less than a week before I sent it back to Amazon. It drove my beyerdynamic DT 880 Pro (250 ohm) headphones better than my crappy motherboard's on-board sound chip, but not by a lot. Then, add to that, the 3.5mm headphone jack was...wonky. Wiggle the headphone cord a bit...one side would cut out.
Because my motherboard is pretty crappy, (ASRock Z390 Phantom Gaming 4) I'd like to avoid one that gets both signal and power via USB, so looking for one that gets the audio signal via USB and power from the wall.
So, being retired on a very fixed income, and with my limited budget, I'm left with only a few options.
FX-Audio DAC-X6 (didn't review very well here) ( review here:
https://www.audiosciencereview.com/...c-compared-to-topping-d30-and-fiio-e10k.2097/)
https://www.amazon.com/FX-Audio-Dig...7TW2JQNN/ref=dp_fod_1?pd_rd_i=B07TW2JQNN&th=1
Fosi Audio Q-5
Buy Fosi Audio DAC Converter 24-bit/192kHz Optical/Coaxial/USB Digital-to-Analog Adapter Decoder & Headphone Amplifier & Mini Stereo Pre-Amplifier Q5 with fast shipping and top-rated customer service. Once you know, you Newegg!
www.newegg.com
Fosi Audio K5
Fosi Audio K5 mini headphone amplifier Support 3.5mm headphone output with the microphone, Stereo Gaming DAC HiFi headphone amplifier all-in-one, supporting optical, coaxial, USB Type-C. Treble and Bass Volume Adjustment.
fosiaudioshop.com
Aiyima DAC-A5 Pro
Or a used Fiio K5 Pro-NON ESS version. (don't know the seller, across the country from me)
(example, not the actual unit)
https://www.amazon.com/gp/product/B...search_asin_title?ie=UTF8&psc=1&tag=headfi-20
Not ideal, but MIGHT work (depending on my USB for power) is the Creative SoundblasterX G6 or similar. I think I'd prefer to avoid an internal sound card. IME, they're prone to picking up "noise" from the various components.
unfortunately, while I'm KIND OF in amirm's neighborhood (western WA)...I'm so far out past the outskirts of BFE that the closest thing I have to an electronics shop within about 75 miles is Walmart.

That leaves me with having to buy things on-line, sight unseen and without being able to actually test them.
Any help, insights, and/or input would be greatly appreciated.