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Side-by-side comparison — scores, specs and which one fits your setup.
Specs comparison
Analysis
The Grado RS2x scores 9/10 with 32Ω impedance and 99dB sensitivity. At 32Ω, it drives well from most phones without an external amp.
The Noble Audio Kublai Khan scores 9.2/10 with 18Ω impedance and 110dB sensitivity. At 18Ω, it can be driven directly without extra hardware.
Based on our scoring, the Noble Audio Kublai Khan 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.