Unverified80% confidenceFactTime unknown
信噪比应≥90dB、总谐波失真（THD）应≤0.1%作为Hi-Fi合并机的合格线，超过0.5%失真在中高音会明显发糊，但胆机THD普遍在0.5-1%却因偶次谐波听感反而更暖
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