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Side-by-side comparison — scores, specs and which one fits your setup.
Specs comparison
Analysis
The KZ ZEX Pro scores 6.8/10 with 32Ω impedance and 109dB sensitivity. At 32Ω, it drives well from most phones without an external amp.
The FiiO FH3 scores 7.4/10 with 16Ω impedance and 111dB sensitivity. At 16Ω, it can be driven directly without extra hardware.
Based on our scoring, the FiiO FH3 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.