…yeah… the Diamond too… excellent sound… flawed design…
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I can 100% confirm all the above problem with Kbear Diamond / Believe was due to moisture vapour CONDENSATION behind the nozzle’s filter exactly as Rikudou_Goku put it 100% because of MOISTURE. Some ears seems to be wetter by nature and hell break loose here.
I own Kbear Believe and I observe the nature of the imbalance with volume hours by hours. Trust me it has nothing to do with a faulty driver nor diaphramn nor anything else BUT the nozzle filter that holds the condensation BEHIND it and creeping to the front and appears as wet spot. How does it happen? It begins moisture vapour that seeps into the front internal cavity and later condensed behind the filter. Nozzle fliter has 2 layers of filter coarse (100 mesh with round spot) and very fine (470 mesh fabric). Front vent 1 mm serves as pressure relief vent as well as moisture exit but there’s 1 layer of filter (270 mesh) behind the vent. All these factors slows down moisture from fully exitting. Moisture slowly pool up and condensed on the surface of behind the fine filter and somtimes the front side. It begins to build up on a smallest spot and spread to the whole filter and creeps to the front appearing like a wet look. In fact there is a substantial about of water condensation behind the filter.
It takes time for the condensation to build up and narrowing the sound passage and thus blocking the sound from coming out fully (low volume). There no cure but I found the quickest way to circumvent the problem by covering the vent with a dry tissue and suck on it. Suck it a few times and water will be absorbed on the dry surface of the tissue. It happens to me everyday after a long listening session or during wet humid rainy day or after shower when I dry my ears but not the inner canal. Moisture is a factor but very fine fliter mesh is the No. 1 culprit. You cannot remove the filter because it will immediately becoming sibilant.
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Thanks
l think it can also get into the voice-coil/driver… because sometimes it takes 2 hours of letting it dry to play music fine again… bottom line its a design flaw. lt doesn’t happen at all with better designed iems…
It is impossible to wet the voice coil bcos only the diaphragm is visible. The rest of the driver components is seal tight. Any leak will cancel bass response (no bass). It has to with remnant of water that saturated the who nozzle surface. Suck the nozzle with nozzle facing the ground. Water may sometimes comes out. It’s not totally a design flaw but also sone ears are wetter.
yeah, my Kato does this, has a visible driver. the brass nozzles prevent that. but the steel nozzles have this problems. 1st world problems ; ]