All this 4in1 hype makes me wonder really a lot about the makers: ****...
From the performance point of view they seem to have really nice drivers (DD and BA) according to most feedback, so the raw quality of these OEM components seems good, which leads me to believe they are expensive... Then comes the tunning of each driver and also the crossover between them, which when correctly made, take a lot of time, a lot of R&D, trial and error, leading to a lot of money spent on that process.
At the same time comes the design and tunning of the enclosure itself.
Then mass production, materials used...
How the heck can they profit from this?
Knowing we have other earphones 10x the price?
Are those overpriced? Are these underpriced?