Is it possible to store In-Ears IEMs without use for many years? Does the time of no use cause permanent damage and die to the dual magnetic dynamic drivers and BAs?
IEMs with dual magnetic dynamic drivers like the KZ EDX Pro and KZ EDC Pro over long-term storage of years do the diaphragm lose frequency performance and generate distortions? In my case 34-36C 59-70% RH
Without knowing exactly, at laboratory standards, what materials, qualities, workmanship, etc. were used, no one can answer these questions. And this will also apply to most manufacturers of these IEMs.
You are also forgetting many points that are more likely to lead to deterioration or failure.
- Adhesives that change or decompose/dissolve (diaphragms, coils, coil formers, housings, component mountings, filters, connectors, etc.)
- Plastics that change their properties, lose elasticity, become brittle, decompose, etc. (diaphragms, housings, component mountings, filters, etc.)
- Whisker formation at solder joints inside the IEMs
- Poor surface treatment that can lead to corrosion (diaphragms, coil formers, housings, filters, connectors, etc.)
- Poor coatings, gold plating, nickel plating, etc., can corrode or even peel off. These small particles are the death of an IEM.
- Cable insulation (internal) can dissolve, flake off, and cause short circuits.
- Especially with compound materials, very few tests are performed these days to determine long-term durability beyond the warranty period (diaphragms, coil formers, housings, component fixation, filters, etc.).
I deal with such problems every day in the industry and continue to encounter new ones.
I have encountered the problems listed above over the past 35 years with IEMs, headphones, and speakers, in price ranges from three to five figures.
No high-quality IEM manufacturer will be able to provide you with reliable material analyses for durability or long-term tests of 5-10 years, let alone beyond.
With these cheap IEMs, there won't be any in this regard, which is why any answer on this topic, no matter what the answer is, is absolutely worthless. You might as well roll the dice. Such IEMs can last for weeks, months, years, or decades. Corresponding user reports prove exactly this.
And to be clear, the necessary materials, analysis, and testing would drive the IEMs you mentioned into high three- to four-digit prices, assuming the sales volume remains the same. But that's impossible.
I would recommend using your life energy more wisely than in such a hopeless endeavor, which you can't change.
Buying such cheap products created this problem in the first place and exacerbates it every day. So live with it.
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