Sound quality is really good, and they isolate really well. I found the silicon tips to be pretty uncomfortable and could not get them to isolate/fit that well. But with the foam tips they fit well.
Foam tips do need to be replaced pretty regularly unfortunately.
Headphones themselves are fantastic. The supplied rubber tips are really uncomfortable and I ended up buying some from a Klipsch X11i which are much more comfortable.
The supplied cable is very flexible, but be warned that there is a clear breakage point where the cable splits. I have had to source a replacement as the cable broke for one ear.
Model: ESR3SEs
These are pretty clean sounding and nothing really overlaps other parts of the music. They dig really deep in your ear so that takes some getting used to but it drowns out a lot of noise without any music playing so they double well as earplugs too. They have a detachable cable using the mmcx standard so it can be harder to replace the cable since the 2 pin factor is more popular from what i've seen, but if you have some shures you can use those cables with these (though you can't use the etymotic cable with other iems that connect the same because there's a pretty nonsensical tab which only allow them to connect with other etymotic iems).
The studio edition doesn't really have the punchy bass, it will play bass don't get me wrong but it doesn't really have that punch that you might get from bassier headphones, so if you're a fan of that like me, you might want to go with the XR's, from the looks of it it shouldn't ruin your music but i don't have personal experience with that model. I run them straight from my phone so if i was to connect it to an amp or a DAC it might but i personally see that as overkill for sensitive gear like these, it gets really loud even at 50% with a samsung s8 so i don't really fancy putting these through an amp.
The recommendation part might seem odd since I like these headphones, but it comes down to how they fit since it's uncomfortable and even painful for the first week, your ears need to break into these compared to a lot of other IEMs where your ears won't hurt just from wearing them. These can get pretty gross too with how deep they go in but etymotic include 2 spare filters and a tool to replace them.
I am using them with the Double Flange Medium tips.
Triple tips are too uncomfortable for me: too deep insertion.
Tried to comparen (just changing IEMs during listening the same tracks) with the KBEAR Neon HIFI, also one-driver armature.
So, these my ETYMOTIC ER3SE are incomparable better: Ety earphones produce much more richer an natural sounding.
Inspired by ETYMOTIC ER3SE, I ordered ERX model. :)
GRAN SONIDO HASTA QUE SE ROMPEN Y NADIE SE HACE CARGO DE LA GARANTÍA
Al principio cuesta un poco hacerse a ellos. Al ser la una inserción tan profunda en el oído puede ser molesto para algunas personas.
Les costó unas 50 horas de reproducción para empezar a mostrarse en todo su esplendor.
Los he usé primero con un reproductor FIIO M6 y posteriormente con un HIBY R3 PRO SABER.
Con este último solo puedo decir que la combinación es maravillosa.
Los graves ligeramente reforzados sin ser intrusivos. Los agudos detallados y brillantes sin molestar en absoluto. Los medios muy disfrutables.
El problema ha venido cuando a los 6 meses de tenerlos uno de los auriculares ha comenzado a distorsionar sin ningún motivo y son inservibles...
Ahora nadie se hace responsable del proceso de la garantía.
DROP se lava las manos y deriva al fabricante
El fabricante LUCID AUDIO deriva al proveedor de Europa
KS, el proveedor, vuelve a responsabilizar a DROP.
Conclusión: No se los puedo recomendar a nadie.