Punch above their weight in terms of sound quality, but last as long as the cheap plastic headphones they are. 7 months after purchase, they have cracked through both sides as shown and developed multiple hairline cracks in the same areas.
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Sure, they're only $20-30 + $10 for Yaxi pads but having to buy new headphones twice a year is a waste. Monoprice Retro costs about the same, SHP9500/Hifiman Edition S cost just under 2x KPH30i, MH752/Sivga 007 cost just over 2x KPH30i.
pattiobearMy experience was exactly the same. Flimsy build, cheap construction. The weak material broke at the same spot under light use while it was always treated carefully.