Got the right fit with double flanges on both sides now, the isolation is quite nice.
Few short impressions as I continue to listen: As people would have guessed, the SD-1 doesn't have that much bass as the SD-2 due to a single driver. That doesn't mean that it has no bass at all though. It hits nicely and is tight but doesn't extend that deep. I would say, coming from Stax, the bass is somewhere around the SR-202s bass. If you're looking for a bit more rumble, you're probably better off with the SD-2. The whole sound signature is pretty linear and natural.
Vocals on these are nothing short of amazing - lush, smooth and not even a single hint of sibilance.
The SD-3 is an amazing monitor and to me it is my go to iem for EDM. I also have the 1plus2 and RTi1 which in their own right are amazing as well, 1plus2 being a great all rounder and the RTi1 for classical, vocals and acoustics BUT when it comes to EDM the sd-3 is untouchable, head and shoulders better. Bigger soundstage, 3D sounding and authorative low end. Not to mention that fit and isolation is amazing too
How do they sound if plugged straight to your DAP without AMP ?