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Side-by-side comparison — scores, specs and which one fits your setup.
Specs comparison
Analysis
The Audio-Technica ATH-M40x scores 7.2/10 with 38Ω impedance and 98dB sensitivity. At 38Ω, it drives well from most phones without an external amp.
The HiFiMAN HE400SE scores 7.5/10 with 25Ω impedance and 91dB sensitivity. At 25Ω, it also benefits from amplification to perform at its best.
Based on our scoring, the HiFiMAN HE400SE scores higher overall. However, the right choice depends on your full audio chain — use our analyzer to see which fits your actual setup.
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A high headphone score doesn't mean your audio sounds great. Your DAC, amp or source might be the real bottleneck.