KZ ASX pairs an unusual 20-balanced-armature driver array and a 4-way electronic crossover with CNC-machined aluminum shells and a silver-plated cable. Sound reports praise separation and detailed treble potential from the multi-BA design, but multiple reviewers call out fit (large, short-nozzle shells) and tuning/imaging problems, making these IEMs a technically ambitious but ergonomically compromised chi-fi IEM.
For sonic tinkerers who want extreme multi-BA separation and a replaceable silver-plated cable; avoid if you need comfortable fit, strong isolation, or neutral imaging.
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