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Specifications
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Analysis
The KZ ZSX is a entry level iem with 24Ω impedance and 108dB sensitivity. At 24Ω, 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 entry level headphones like these.
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