I think I got that DAC you mention, or one like it, also sold as "ELE EL-D00"
https://www.ebay.com/itm/Details-about-ELE-AUDIO-EL-D00-PCM2704-MINI-USB-DAC-SOUND-CARD-GREEN/232418727141?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
That has some wrapping over it.
There's also ELE EL-D01 and D02.
I have the D02, too.
But the D00 "lacks bass" because it is just a DAC. Pay attention to the title and description as it makes no mention of amplification. I don't know too much how all this works, but I didn't realize either. So plugging the output from the PCM2704 stick you got to a separate amplifier might sound good.
I also have this white stick one that has PCM2704 on it:
https://www.ebay.com/itm/PCM2704-Mini-USB-Powered-Sound-Card-DAC-Decoder-3-5mm-DC-5V-for-PC-Computer/202085722272?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2648
I thought it looked nicer and tends to cost just a little bit more (dollar or two), and as you can see it has those two yellow capacitors on it, which add some amplification, I think, and indeed has a little more bass. Unfortunately the output power can be too much for IEMs (my expected use), so I have to keep the volume down low. I like how with the regular PCM2704 stick (yours) I can play with the Windows volume much more, even though it's not really meant for direct listening.
However, I want to mention another cheap device that sounds better than these... the "X5," which can be found by searching for PCM2706+CS4344+TDA1308, like this:
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.H0.XPCM2706+CS4344+TDA1308..TRS0&_nkw=PCM2706+CS4344+TDA1308&_sacat=0
or maybe just "X5 USB DAC"
I got this last year and still like it better than these others I keep trying. I'm curious about the subject, and posted about it here:
https://audiosciencereview.com/forum/index.php?threads/pcm2704-usb-dacs.2203/
I don't know too much about engineering and sound, but I often wonder "how low can you go?" and "why do some phones and portable players sound so good, but my PC doesn't"
It's still a frustration to me. It seems like it should be possible to have very good sound for very cheap out of a small device, but usually there's some catch, like extra noise or problems with the volume controls, distortion, or cheap manufacturing where the parts are fake (supposedly) or misaligned. (For instance, with my white USB stick the volume jack was attached at an angle, more so than is shown in their eBay ad).
But that X5 product, despite picking up too much noise from my PC (EMI interference, I guess), has a good sound to it. Not perfectly sharp or clear, but a bit bigger than expected (open, airy somewhat), with padded bass, more enjoyable than the others to me.
I'm still on the lookout for other devices. Here is one I tried:
https://www.ebay.com/itm/CM108-TDA1305T-TDA1308-3-5mm-Output-USB-Amp-USB-Sound-Card-DAC-Decoder-5V/272909483959?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
Unfortunately it picks up even more noise from my computer I think. I tried it out of my PS4 and I didn't hear noise, though I was using bigger headphones and not IEMs, so maybe I should make sure with sensitive IEMs to see how bad it is. But it does have an interesting sound, if "lo-fi" (as its looks might suggest). The TDA1305 apparently came out around 1995, but in large measure the device sounds similar to more recent stuff to my ears, it's just a little more muddled and seems to have a sturdy/dense bass area to it and less highs. It has a "slower" sound, I think, as some use that word...
And if you are curious, here's a couple of others I was considering (fascinated by the broken English in the descriptions):
https://www.ebay.com/itm/132104200568
https://www.ebay.com/itm/272386375604
https://www.ebay.com/itm/253062529855
https://www.ebay.com/itm/142120618777
etc.
I know I should quit and just get something higher quality, but I find it more interesting to explore and chance upon things without really knowing what i'm doing
(I do think there is a difference in cheaper, amateur products... it is when you get into real "high fidelity" (accurate) sound that the differences should disappear... because that's the whole point, the product is merely trying to be accurate, so one accurate product should sound the same as the next... as an example of how some behave though, they openly describe their product as having tweaked sound, for instance this ad:
https://www.ebay.com/itm/2018-XMOS-XU208-Asynchronous-USB-DAC-Sound-Card-384K-DSD256-Native-Headphone-AMP/263416456770?ssPageName=STRK:MEBIDX:IT&var=562436301541&_trksid=p2055119.m1438.l2649
It says:
"The DAC is specially tweaked by ourselves for smooth,reality and detailed sound, The original product from manufacture is a little harsh and dry,especially the treble,It is not smooth enough, We are experienced in tweaking audio products, The sound is much different from other seller's,The sound is very smooth and silky,Also make a bigger stage scence and rich timbre, The audio source is the most important for an audio system,I assure that the tweaked DAC will surprise you."