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平衡输出（4.4mm/XLR）相比单端3.5mm理论上输出电压翻倍、功率约提升4倍，且能改善左右声道串扰，但仅当耳机本身支持平衡换线时才有意义

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Unverified平衡输出（4.4mm/XLR）相比单端（6.35mm）通常电压摆幅翻倍、功率约为4倍，但仅在耳机本身支持平衡接线且线材质量足够时才有意义；单端已能推好的耳机换平衡提升有限96% similar Unverified平衡输出（4.4mm/XLR）相比单端（6.35mm/3.5mm）通常提供约2倍电压摆幅和更大功率，串扰更低，但仅当耳机本身支持平衡换线时才有意义，标准3.5mm单端耳机接平衡口无效94% similar Unverified平衡输出（2.5mm/4.4mm）功率通常是单端的2-4倍且串扰更低，但仅在耳机本身支持可换平衡线时有意义；用普通3.5mm单端耳机则平衡解码线毫无价值92% similar Unverified3.5mm单端与4.4mm平衡输出：平衡口通常功率翻倍、串扰更低、声场更开阔，若耳机支持平衡线优先用4.4mm口，选购时确认放大器带平衡输出91% similar Unverified带平衡输出（4.4mm）的耳放输出功率通常是3.5mm单端的2-4倍，若耳机有平衡升级线且难推，优先接平衡口获得更大动态和声场90% similar

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