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Side-by-side comparison — scores, specs and which one fits your setup.
Specs comparison
Analysis
The Campfire Audio Io scores 8.2/10 with 16Ω impedance and 103dB sensitivity. At 16Ω, it drives well from most phones without an external amp.
The Sony WH-1000XM4 scores 8.2/10 with 47Ω impedance and 101dB sensitivity. At 47Ω, it can be driven directly without extra hardware.
Both headphones score equally. The best choice depends on your full audio chain — use our analyzer to find your actual bottleneck.
Own one of these headphones?
A high headphone score doesn't mean your audio sounds great. Your DAC, amp or source might be the real bottleneck.