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Specifications
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Analysis
The ZMF Caldera is a reference over-ear with 55Ω impedance and 95dB sensitivity. At 55Ω, these headphones drive well from most phones and computers without needing an external amplifier.
Your audio source matters more than most people think. Spotify High Quality is fine for casual listening, but with FLAC files or lossless services like Apple Music or TIDAL you'll hear a clear improvement — especially with reference headphones like these.
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