For ER2, I didn't notice any differences in the 6-8 kHz recess with stock foam in one ear and triple flange inserted to my brain in the other when using tone generator but felt stock foam was brighter when listening to music. Which is why I asked you before if you had a measurement of ER2SE with stock foam tips vs triple flange lol.
Measurements don't work very well with the foam tip unfortunately. 6-8khz hmmm maybe 5-6khz. I'm pretty sure after the foam affects 8khz to 10khz. One has to do this with sine sweep. The foam tip basically shapes the highs it shapes some of the energy in the 13-16khz range to lower, filling some recess around 8-10khz. But I haven't done stuff like this for 2 years now. Some may not go exactly right from memory.
Yeah, with a sine sweep I wasn't getting those differences. Nonetheless, such a small thing doesn't stop the ER2SE from sounding incredible.
I just checked my old measurements for er2se. The dip is indeed around 7-9khz. And it should be improved from the foam tips.
I definitely don't hear the valley extending to 9 kHz. First graph is much closer to what I hear with both foam tips and triple flange.
This is similar to the EBU 3276 target with the rolloff beginning at 2 kHz. The reason I said Etymotic is not perfect is because the rolloff only begins at 5 kHz relative to diffuse field. That's my understanding at least, unless I'm missing something.
Sadly the information is being lost because Etymotic is too good for this world. A lot of this information isn't easily accessible to the general consumer. I am planning a video soon discussing all of this.
There was a product called ED-1
Curious why you mentioned Susvara as your endgame when this exists
This is just EQ basically so nothing too fancy.
Is it much more difficult to tune the driver itself vs hard EQ?
Not so much the driver but the acoustic around it. It's definitely not TOO difficult. And using planars or electrostatic it's easier to tune as they usually are already very good.
