Impressions for the Yincrow RW-3000.
All listening and comparisons have been done via the Qudelix 5k, as it is the only source I own, apart from my retired Radsone ES100. I first tried full foams, was shocked by the amount of bass and went to donut foam, which is still on there now and makes for a more balanced listen for my old ears.

First off: The RW-3000 is a mighty fine sounding earbud!
It is balanced sounding with a bass boost, which surprised me. From what I had read before I expected this set to be brighter. I could also say that this is a very shallow V-shape, seeing that there is the bass boost and more vocal presence and lower treble compared to the upper treble. It is not that the upper treble rolls off a lot however, cymbals sound complete and absolutely correct, they are just less upfront as in the DBX for instance.
The timbre is very nice. There is a certain high end feeling silky slickness to the sound. This makes it sound a bit like details would be smoothed over, but this is definitely not the case! I will make an analogy here:
You could buy a Fender Deluxe Reverb which is a tried and true guitar amp that can give you all your classic american guitar tones from pristine clean sound to rock and blues sounds. Or you could buy some Toneking boutique amp, which will also give you your classic american guitar sounds but with a certain twist to it which might not be noticable right away. The RW3000 is the Toneking in our analogy here. If you'd prefer the Toneking to the Fender Deluxe is a question only you can answer, after all the Deluxe is the real deal, isn't it?

You can listen to the RW3000 all day long because of its silky sound and won't get tired of it. This again makes it sound like the treble would be a bit recessed, which it is certainly not. It is perfectly dosed. The RW3000 doesn't grab your attention and forces you to listen critically, but you can if you want to - all the detail is there. In part the unfatiquing nature of the RW3000 is also rooted in a certain dominance of bass over the rest of the frequency response. Bass guitar (or its equivalent in electronic styles) is nearly always taking center stage here, which for me is a bit of a downside.
I find the RW3000 to not have a very wide and deep stage, but within its width the imaging and seperation is really really good, so the width is not a problem at all, but rather part of the "not forcing you to listen critically" mentality of the RW3000. Concerning the depth I find myself craving some more. The layering is fine, the vocal presence is perfect for my tastes, so the vocals are placed in perfect distance dor my liking and the cymbals and drums are placed behind. In relation to width and depth there is more height than in any other earbud I own. Transient response and dynamics are very good, beeing responsible for the great seperation, which in turn helps the other instruments not beeing drowned by the certain mid- and upper bass dominance the RW3000 exhibits.
Bass:
I think there is actually decent subbass and it probably doesn't even roll of too heavily. It is just that the bass response has by far the most energy in the midbass, probably around 150 HZ or slightly above. The bass is punchy and quick, but you wont really notice that if a bassline is playing in the range where the RW3000 has the most energy. Then the bassdrum will definitely take a backseat. At the 5 min mark of Get Lucky by Daft Punk the Bassdrum is playing alone for a while. Super punchy and sounds absolutely great. Sadly the rest of the song this bassdrum is beeing drowned out a little by the bassline. This I am not a fan of. On the other hand the bass of the RW3000 manages to not ever overstep into the lower mids, which is a mystery to me, given the amount of mid- and upper bass it has. Male voices do not sound overly warm, but have good note weight. Because of the relatively strong upper bass the texture of the bass is only good and not great.
I think the bass is really refined and good, the tuning just doesn't hit my preference. It is however a part of the silkiness of the overall tuning.
Mids:
Really really nice and great timbre there. Even between male and female vocals. Especially woodwind and brass benefit from the silky nature of the tuning and sound absolutely spectacular. Electric guitars sound rich and have the perfect bite.
Treble:
Very smooth sounding! Next best treble I have ever heard apart from Temperament DBX. Slight overemphasis of mid treble over upper treble. It doesn't really feel like there is too strong treble rolloff or extension missing. A similar thing happening here as with the subbass. Again part of the silkiness of the tuning. (I am hoping this is the last time I am using this word in this impressions post, as are you most probably!

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Conclusion:
The RW3000 is a very musical sounding earbud - a very refined tuning. I can totally see this beeing endgame for some. As it stands right now I am devided, as the bass somehow doesn't do it for me. Also I have no desire to EQ this, seeing how refined it sounds.
Comparisons with Temperament DBX, VE SMG and Rikubuds GAS3 to follow sometime in the next days.
Oh, I forgot to mention a peculiarity:
The fit is really good for me, the asymmetric shell is very comfy. The buds are marked as left and right. If you plug in the red mmcx into the right bud then it is setup for over ear wearing, meaning that these buds are really meant to wear over ear. However they also fit perfectly fine cable down. In this case you have to switch the buds on the cable wearing the left bud in the right ear. In my opinion they should have made the buds without the markings.