I was hearing few negative reviews online on the fit which said that the internal canal of the ears were hurting for long time listening , I should say to the contrary that it was quite comfortable for me. The primary purpose of this purchase was to get used to studio grade sound which certainly will improve my ability on critical listening. Since I’m a audio calibrator I’d try and match the pink noise of the loudspeaker to the ER4’s by tweaking it through positional and electronic Eq . I’m glad that I was able to buy these through Headphone Zone cos if not them I don’t think the rest of sellers in the industry would have even heard of such great brands. Thank you for bringing in this brand into our country.

I upgraded to ER4SR from an ER2SE. I wasn’t sure if the improvements were going to be significant. Also, internet forums do paint BA drivers as inferior to dynamic drivers.

Firstly, i was looking for a more accurate, but enjoyable sound signature. ER4SE delivers this well. The clarity is itself worth the upgrade. I heard this through the Qudelix 5K (on bluetooth) and the Chord Mojo. Bass is delivered as it is captured in the track, but it has no slam or won’t rattle the head. For complex tracks (Thundercat’s Uh Uh), what shines through is the instrument separation. BA signature was a non-issue for me.

In terms is isolation and comfort, it is an Etymotic. It does work for me. The triple flange stock tips actually fit me better than on ER2SE.

Overall, it sounds like a high end speaker that will work with most portable dac/amps. Its a real bargain!

Headphonezone service, as ever, was excellent.

I finally purchased the legendary Etymotic - ER4SR after so many IEM's and headphones. It's a folklore amongst music enthusiasts at Head-fi.
I'll try to provide my brief analysis since I've tested it for 12 days.
The phone used was the Rog Phone 2. It's more than capable to power the Etymotic - ER4SR. Not to forget it also powered the Soundmagic E80C which is a 64 Ohms impedance budget IEM.
Design and Comfort: The IEM looks and feels premium. However, comfort wise it's a kind of a mixed bag specially if you are using the triple flange eartip. However, there are many eartips provided in the box so it wont be that difficult to get a secured fit and comfortable fit.

Sound Quality: This is where it really shines or may I say proves that it's the perfect reference IEM. The sound is completely flat, nothing is boosted. Newbies might not like it but if you're an audiophile or musician you will really appreciate it.
My previous headphone was the V-Moda M200 which was really good however it pales in front of the Etymotic - ER4SR. Also, its able to block out a lot of ambient sound. The best I have witnessed on an IEM so far.

Value for Money: For the characteristics of this IEM, the price is very low infact pretty reasonable. However, most Indians are really underpaid at work hence I would suggest you to first try out the Soundmagic E80C. It is an excellent IEM with a balanced soundstage.

Upon conclusion, I feel that one will truly appreciate the Etymotic - ER4SR once you've become a true connoisseur of music or let's just say flat sounding music.

I have been in the IEM market for over 2 decades now. I have tried many things from many brands, flagship or otherwise. This IEM however comes close to the end game as far as SQ is concerned but with a few caveats.

See the SQ of this IEM is hard to beat - it is detailed, dynamic & accurate enough. However -
1 - If you are into IEMs with ethereal bass - this won't do. This has enough bass, really good bass too, but it won't tickle your spine on Fat Bottomed Girls.
2 - The fit, oh THE FIT. This takes a while to get used to (this is my 2nd pair of Etys). In the beginning they are uncomfortable - very uncomfortable. Once you get used to these though, they almost disappear - almost. HOWEVER, you give them a break for lets say a couple of weeks (if you have multiple IEMs) - the process starts again. It is cumbersome to say the least, the SQ is worth the pain though. YMMV.
3 - The cable. Not the worst - definitely not the best. More on the annoying side of things - microphonics + the weight. A big reason you never forget you are wearing these - that's why I said almost.

HOWEVER - if you can get over the issues above, these IEMs are hard to beat for the price or at any price. I personally love them and will always have a pair in my inventory.

Etymotic - ER4

Extraordinary value for money, BA driver but DD Timbre, every frequency is separated. It can be heard in a precise & distinguished manner, and the soundstage is average, I have bought the SR version but I don't miss the bass! Every other gear which is costlier than these now become redundant in my possession, HFZ should not sell these as it might be the end game for most of the audiophiles out there!
I am using these with Cayin N3 Pro, Earmen Sparrow & Fiio M11 Plus ESS with a Tidal subscription. I think I am going to stop spending on IEMs for a while!!

Loved the sound and comfort.