In this config, if the black squares are caps, the top driver is connected with a 2nd order crossover (12dB/oct), this might not be the most optimal unless the goal is to boost only the highest frequencies in a narrow range

LOL thanks for believing in me

clearly there's sound leak, you just have to find where.

From what I see you have a front-volume vent going to the top, this is why you got no bass, you need to partially block the vent with damper and vent the back volume of the DD at the same time

Glad you like our Hybrid 3Pro :)

Thank you Marcus for a wonderful review! Whaaaat! hahaha! That's AMAZING guys!

Actually HeadphoneCompany should have FIBAE 7U demo, reach out to Thomas. They don't list 7U on the website but do have a demo.

https://eu.mouser.com/ProductDetail/Knowles/RDI-33438-000?qs=BJlw7L4Cy79a%252BXw%2FeRvFfw%3D%3D https://www.digikey.com/en/products/filter/speakers/156?s=N4IgjCBcoLQCxVAYygMwIYBsDOBTANCAG4B2aWehA9lANohxwDsATAJwgC6hADgC5QQIAL6igA

In my personal opinion, here's the thing, Knowles is a huge company (700M$ reported revenue for 2023, 1.4B$ in assets LINK) and funnily enough I think Balanced Armatures are their smallest share of profits. They moved to automated lines such as whole new R-series (RAU, RAN, RDI, and many many...

It could be an artifact form the sound card. In general anything below 20Hz you can disregard.

That because the vent releases pressure in the opposite phase. You are feeding the inverted phase signal into positive signal canceling portion of frequency, obviously the result is lower SPL and added distortion. I understand you want concept similar to transmission line in speakers, but...

Quite interesting, isn't it? The feedback is so similar around the world, even when accounted for personal preferences it still is very much uniform. @Animagus thank you for the wonderful review! I really appreciate it.

That's in installments , duh!

Which you can probably throw out now, because neodymium magnet will damage the internal (permanent) magnet of the BA. Speaking from experience.

Glad to hear! Enjoy! always happy to help!