Unverified90% confidenceDecision RuleTime unknown
耳机阻抗需与声卡推力匹配：300Ω高阻抗大耳需选高电压输出（≥2Vrms）的桌面声卡或强推力小尾巴，低阻高敏耳塞（<32Ω）反而怕底噪需选低输出阻抗（<1Ω）型号，否则易出现声音发闷或底噪明显
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Unverified选择便携耳放需匹配阻抗：低阻高敏耳塞选低增益档（输出电压1V以下），300Ω高阻大耳机需选输出电压≥3Vrms、输出功率≥100mW@300Ω的机型90% similarUnverified监听用途选耳机时阻抗和灵敏度要匹配返送/调音台输出：低阻高敏（如16Ω/110dB以上）适合手机和调音台直推；高阻（100Ω以上）需专用推力设备，插错设备会导致音量不足或底噪明显88% similarUnverified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88% similarUnverified灵敏度高的低阻入耳（如8Ω/110dB多单元动铁）优先看底噪而非功率：选输出阻抗＜1Ω且高增益档不啸叫的设备，否则电流声明显；这类耳机大功率台机反而容易过推失控88% similar
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