Tons of resources for general troubleshooting in the previous 1,000+ comments. When you have a better picture of what you are trying to accomplish, we can offer a better explanation toward your project.

Common designs only feature RC circuits. No inductors are used.

Yes and no. BA’s are incredibly inductive. Hence, not using inductors as passive components. They same can not really be said for dynamic drivers.

For fixing tubes to drivers, I use loctite uv glue designed for medical devices. It is not cheap but lasts forever and doesnt crack over time or slip off from the drivers. For gluing drivers to the inside shell I use clear patch resin.

SM Ceramic capacitors donot require polarity.

Venting out of the shell will cause a considerable loss of sub frequency when using BAs. In practice, Ive never had much success. Maybe others have? I know with DD’s and Planars it can work wonders.

Literally too many variables and not enough information to give you anything specific. We would need tube lengths, diameters, dampers, passive components, and so much more. My first bit of advice would be to keep it as is and remove all passive components and retest. Second start your mid...

What is? 😬

Using the Pro3dure curing unit changed my life. 🤣🤣

Light intensity for sure plays a role. Distance from the source can lessen the intensity in a very uncontrollable way. A 40W LED is not going to penetrate like a 80-100W LED. That being said, you are spot on about timing. I find on clears and whites, I have to dial back light intensity to...

Some paraffin wax is thicker than others. I have used the red wax from Soundlink in the past, with great success.

Stores? Sure. But, the proper driver from a particular store? No. Someone else may be able to help you out with that.

What wax are you using? Probably a bit of contaminate?

AliExpress or TaoBao. More success is found with Ali in my experience.

Here is the testing microphone and adapter I have used for years, to test out custom IEMs. Dennie Miller has been an awesome resource and extremely helpful with an question or product support issues. Hands down would recommend him and his business to anyone. He also sells Smaart software...