Unverified90% confidenceDecision RuleTime unknown
阻抗32Ω以下、灵敏度≥100dB/mW的单元可由手机直推；阻抗≥150Ω或灵敏度＜95dB的高阻单元必须搭配耳放/解码器才能推出足够动态
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