Got a pair of barely used HD600 (2019 ver.) today for $160, surprisingly they are not that "sharp" sounding, nor lack of bass IMO. I'm quite satisfied with the sound :) I've been planning to order the HD6xx on the coming Black Friday for the last few weeks, since ~$300 is a bit to much for me...

Thank you so much for your help Dave. After reading your replies, I reviewed some of the discussions earlier and found out that this kind of questions had already been asked before.

I've total confidence in what you said, the grey and the clear are from the same mold. I've compared them side by side. But is there any chance or at any point some even larger size tri-flange tips were made from a different mold, which will explain why my clear tips are larger than the current...

Just received my ER38-18 grey replacement tips. Unfortunately, they are not the same size as my original "Large" size clear tips, which came with my MK5s. These smaller large grey tips don't fit my ears at all. I read some of the Amazon reviews stated the same thing claiming the large grey tips...

I've decided to get the large grey tips (ER38-18), since this is the only option available for me on Amazon. But I'd like to know is there any difference between the grey ones and the clear ones (ER38-18CL ), except for the colour?

It's kinda weird, at the Etymotic Research Store on Amazon, both of their ER38-18 (Large grey-tips) and ER38-15SM (Small clear-tips) can be shipped to my location (Hong Kong). However, the ER38-18CL (Large clear-tips) is shown beyond seller's shipping coverage. I'm having a hard time try to...

Finally got my first Porta Pro, I totally understand why people praise them so much.

More prison tech info if you're interested. I guess they took out the foams so that there isn't any compartment that is not visible for inspection.

@EtyDave, I would like to know if this ER38-18CLL is the same large tips that originally came with the MK5? The large clear tips that came with my MK5 are surely not "long stem", they have recessed stems which are not the same as the ER38-18CLL that recommended for MK5 on the Etymotic site...

https://soundchaser.org/notes-from-innerfidelity-podcast-no-10-with-dave-friesema-lead-engineer-at-etymotic/ Notes from InnerFidelity Podcast No. 10 with Dave Friesema, Lead Engineer at Etymotic - SoundChaser.org

The clear tri-flange tips that came with my updated package ER3 & ER4 are slimmer and shorter than the ones that came with my MK5. I'm having a hard time to get a good seal with the smaller clear tips, I have to use the same old pair every time I switch my Etys. Are those smaller clear tips...

Thanks for you information Bhelpoori

Thanks LIVE_EVIL, that's a very accurate description of my Etymotic experience too.

Any Senn HD6xx/650 owners here? How would you compare them with ER4SR/XR/or other ER line-up? I'd really like to get the HD6xx, since I've never own open-backs before.

The microphonic is not as severe as the MK5, the ER3SE cable is a lot softer. Maybe because the cable hit less hard on/by things.