ESX, one of KZ’s standout successes, has been revisited for the company’s 10th anniversary with a new special edition. Maintaining its signature affordability, which is a hallmark of KZ products, the latest ESX presents an enticing value proposition that outperforms other earphones in its market segment. For this special edition, KZ opted for something unique, featuring a single 12mm diameter copper-rim dynamic driver with a 5-micron thick LCD liquid crystal diaphragm, ultra-thin coil wire, and a high-flux magnet—prioritizing raw performance over the complexity of multiple driver crossovers. The design includes an air guide with a balance hole in front of the driver, along with a balanced back-vented cavity, ensuring controlled airflow and resonance. With an impedance of 22Ω and a sensitivity of 111dB, these earphones deliver rich bass, clear high and mid frequencies, and an energy that’s unmatched in this price range.
 
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