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Side-by-side comparison — scores, specs and which one fits your setup.
Specs comparison
Analysis
The ZMF Caldera scores 9.2/10 with 55Ω impedance and 95dB sensitivity. At 55Ω, it drives well from most phones without an external amp.
The HiFiMAN Arya Stealth scores 9.2/10 with 32Ω impedance and 94dB sensitivity. At 32Ω, it also benefits from amplification to perform at its best.
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.