what exactly did you mean by that?

Looks like the days of my ER4S pair are numbered. Both barrels are showing tiny cracks on the nozzle area. Might be due to age or the infamous Knowles filter issue. Any idea that might help to save Ety? Superglue?

Again that yellow stuff. Where do they get it, I wonder...

Question for fellow ER4S (not P, SR, XR) users. Do you hear sub-bass rumble at the start of this video which lasts about 10 seconds? Neurotech - When the Night Falls

Sonion

@EtyDave I suppose, acoustic dampers are matched in Etymotic iems as well? It seems Knowles dampers come in different sizes. Do you know the size for ER4?

Mine is old gen with plastic body. Thank you for advice. I don't really understand this part. Would you be so kind to explain?

Maybe it's placebo but somehow plastic green filters paired with ER4 result in different sound vs Knowles acoustic dampers. Does anyone know where genuine Knowles dampers can be purchased?

And the reason for that is? Also, according to service manual it's not a good idea to open up 700's until absolutely necessary: "More than 30 minutes's exposure of a high polymer diaphragm used in the SE-700 will affect its property, resulting in impairing the tone quality. Also never touch...

Yep, it really was an old filter that messed up balance and projection of sounds.

Even though it looks clean with magnifying glass?

Experiencing weird behavior with my ER4. Feels like balance has shifted slightly towards the right side, and sometimes most sounds come from this earpiece. Everything was "centered" before. Does anyone have a clue what that might be? New eartips didn't work. I haven't tried to change the...

He did that 7 years ago.

Sonosax SX-M2D2

Depends on what you prefer. RS1 is heavily colored pair of headphones.