Superseded90% confidenceDecision RuleTime unknown
耳机阻抗≥250Ω（如HD650、DT880 250Ω版）需要输出功率≥250mW@300Ω的耳放才能推出足够动态，便携小尾巴普遍力不从心，应选台式独立耳放或大推力便携（如输出电压摆幅≥4Vrms）
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This knowledge claim has been superseded by newer content
阻抗≥250Ω的监听耳机（如DT880 250Ω/HD650 300Ω）需搭配独立耳放或声卡驱动，直插手机/笔记本会声压不足、动态受限；仅用便携设备驱动应选32-80Ω版本Sources
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