Thanks, it’s always good to have some reference:)

Do you have any freq response of that setup build by yourself? I would love to see/hear your point of view (if that makes sense);)

Thank you. I did a little mistake, it was 33 with 47 ohm resistor, not 10ohm like on the picture. I was looking for a little bit of lowend enhancement in this setup and I was hoping of getting that lowend little pushed without the resistor but I can see that this 6k like to show up as well. And...

I would try that setup with the yellow damper and without resistor on the 33 like that. Should working fine: How do you know that curve looks/sounds good? Or if it’s not too flat?

Please tell me what would be your go-to curve as a reference? If you would build that setup, what would you do? I am afraid of losing a perspective in that project.

I got rid of the attenuation on the woofer and set orange damper on it, with smaller diameter tube. Maybe I should better put back the yellow on it?

I did few updates and modification to my 33&2389 circuit and came up with this result. It will be a onstage CIEM. It’s pretty flat and I can’t tell if it’s good or not, regarding to a ear freq response is it gonna be ok or harsh in the 3k area?

Ferrofluid? What is that?

What’s gonna happen if you close the back vents? Bass drop?:D I did series/parallel connection and parallel is the one which works the best. Thanks to your suggestions SWTNATE. Btw what was your best setup for the 33 and 2389? Did you try 2389D?

This is looking interesting, how about the grinding stone? Are you using it too?

Thanx man:)

You mean something like this?

Thanks! One more question. How is your approach in rounding the edges of the faceplate? Is there any tool that can help to do it even?

Ok thanks, that was because I had a resistor and capacitor connected as a Lopass on my woofer but recently I decided to get rid of the cap and that 2 resistors is a left over, good point Piotrus, thanks. I’ll do a better Lopass with the damper, I hope that’ll help:)

Thanx I’ll try that one. Btw I am a huge fan of your work here, your finishing and final look of your iems are outstanding! Btw do you have any hint to put a finish lac on the plate using a brush to get the super flat/smooth surface? I am using Dreve Lac 3 for finish.