I think the easiest way would be just to unsolder the wires from the PCB on the first figure. That’s what I’d do first and safest.

I do not see any breakages, it might be torn right at membrane that is not visible on these pictures. Quite common failure point. Getting there is quite hard, just testing the line for continuity might be simpler and would rule this out or not.

That’s planar mag drive; if the wire is indeed torn, soldering it would not be an easy feat; but chances are, membranes got torn or creased, this particular model has quite crappy material according to a quick search. You might want to unsolder the wires from control circuit and attach some other dynamic to their terminals to check if there is signal; also carefully measure resistance between the same wires (should be like very low) to check this hypothesis.

With broken sound making component, the most sane approach is to buy a new acoustic driver. Rolling out DIY means pretty much designing it (or reverse engineering the old one with unknown materials), matching sound geometry and impedance and all, which is kinda hard, time*money expensive, and fun.

Open it, the really tiny wires leading to speaker often just fall off due to rush factory soldering

This is possible but will take some time and resources for the tooling. Quite a lot of time if you are short on resources.

Well it’s not like there is whole lot of stuff shipped from US to EU. The trick is, digital services sure would not be tarrifed (and if they are, users would still have no choice but to pay).

Yeah, he’s been doing this stuff since I first read about him in 2010 or so; yet now, thanks to Trump lol, things look differently.

We’ve made shitty dewars by packing vermiculite flakes scavenged from shipping containers (many retailers might have a box filled with these) between two jars and sealing the gaps with epoxy. They might degas though, but that’s manageable.

In the end though, well designed oldschool baking oven beats this in everything except footprint.

Also saw someone using just single overheated iron pot on gas stove as tandoor.