KZ ZS12 PRO X Metal Earphones 1DD+5BA Hybrid HIFI Bass In Ear Monitor Headphones Music Sport Noise Cancelling Headset New Arrive 10mm Dynamic Driver with Adjustable Bass Response via Tuning Switches Customizable Bass Tuning for Different Music Genres Hybrid 1DD+5BA Tuning for Balanced Audio Performance Lab-Tested Frequency Response with Multiple Tuning Options Lab test results. Actual performance may vary based on ear fit, device output, and audio source. Tuning switch effects depend on the combination you select. How to Adjust Bass Performance: The 4 tuning switches let you customize the sound profile. Switches 1/2/3 boost bass in 3 levels, while Switch 4 adjusts high frequencies. Please refer to the frequency response curve to choose the setting that fits your preference. Note: Bass performance depends on a tight ear tip seal (try different sizes/foam tips). Sound experience varies by ear canal shape and music genre, which is normal for in-ear monitors. As shown in the actual photos: PS:The color may vary slightly under the lighting, please refer to the actual product.

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