Unverified80% confidenceCautionTime unknown
低阻高敏耳塞（如16Ω/120dB）用户不建议买标称THD+N看似达标但底噪（残余噪声）＞2μV的耳放，应重点看耳放IEM档的底噪指标而非最大功率
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80%
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Long-term
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Unverified灵敏度高（≥110dB/mW）的入耳耳塞对底噪敏感，应选输出阻抗＜1Ω、本底噪声＜2μV的DAC/耳放，避免大推力台机产生的电流声，小尾巴或专门的IEM档位更合适83% similarUnverified高敏耳塞用户不建议买大推力桌面耳放，大功率放大器在小音量段电位器易失衡（左右不平衡）且底噪偏高，应选带增益档位（低增益/IEM Match）的机型83% similarUnverified判断耳机是否需要耳放：阻抗高（＞100Ω）或灵敏度低（＜100dB/mW）的耳机往往前端驱动不足，会表现为音量不够、低频松散、动态压缩，这类耳机受益于耳放最明显83% similarUnverified只用低阻(≤32Ω)入耳或蓝牙耳机的用户不建议买带大功率耳放的声卡，功率过剩易导致低阻耳机底噪明显且浪费预算83% similarUnverified选购便携耳放前先确认底噪：高灵敏度入耳耳塞（如多单元动铁）搭配大功率耳放易出现明显嘶嘶底噪，应选专为IEM设计的低输出阻抗（＜1Ω）低增益机型82% similar
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