So next on to SA6... first one thing that suprised me is how smaller the SA6 next to the SA3, I promised pics to illustrate better here they are :

Now on to the sound...
The SA6 is a very refined IEM, first it has flawless technical foundations : it's really downright impressive at this price point to me it competes with IEMs 2 or maybe 3 times the price (yes, really). Resolution is excellent this stands out even more with a pitch black background providing fantastic contrast, extension is superb both ways providing tons of fun in a balanced way. Mids strike a great balance with a very engaging vocal presence, enough lower mids to provide body yet remain transparent, articulate with just the right touch of bite. Treble extension is nothing short of superb and this helps the SA6 provide a lot of air opening the soundstage and helping the imaging precision with great separation without this being overdone. There is more sparkle than SA3 but at the same time the delivery is smoother with "wetter" notes as well, there is more body to the treble and it's delightful. The tuning coherence is superb and the SA6 is very natural sounding. SA6 is both technically impressive and highly engaging, a winning combination in my book and a rare one at that.
This is with switch to off. Turning the switch from default (OFF) to "Atmospheric Immersion" (ON) is more subtle than most bass switches. It's also much easier as you can switch with no tools while keeping the IEM in your ears, kudos Dunu for this! The switch is really done right in my opinion and on bass light tracks turning it on will have a limited effect while on bass rich tracks you will get some pretty nice kick in the bass department! Not that the SA6 is bass light with switch to OFF you still have plenty of bass kick and good sub extension, what you do get with switches ON is just the extra sub and mid bass to get into serious toe tapping territory (but not into bass head one either). On the flipside one might make a case that the switch to OFF position is a bit more articulate with bass detail easier to perceive, that's my first take but I need a bit more time to elaborate.
Now all this is out of LPGT with the very nice stock cable. Let me tell you what happens when you switch to Blanche... you gain a level of refinement that only great upgrade cables will provide, the bass textures are richer and provide more detail and a tad better control, the mids are a tad more open with more bite and the treble is taken to new heights with a more natural delivery and more nuances as well as a tad more sparkle.
Where I feel the SA6 with its stock cable is up there with IEMs 2x the price like say Rai Penta, with Blanche it really scales even further and competes with one of my favorite IEMs in 2019, the Tansio Mirai Zodiac 3x the price (where it should be compared to the TSMR-5 which I'll include in my review)... granted the Zodiac has the edge on soundstage and transparency but the SA6 is punchier. I wouldn't say it stretches to QDC Anole VX with its 3 switches system but the resolution is not far behind and I dare say the SA6 is more natural sounding. This is honestly unexpected and a good thing for all of those who are on a budget and want to get a top tier performance IEMs for a reasonable price which comes in scarce these days.
A strong entry into the full BA market!