Harman Target Versionkz castor musicians in ear monitors earbuds with the harman FR curve as its tuning target, built upon the acclaimed harman FR curve within the hifi community, whether it's in terms of parameter performance or sound perception, it outperforms most IEM. Harman Target with Improved Bass Versionkz castor iem, customized for audiophiles seeking deeper bass, based on the harman FR curve, enhancing low-frequency sensitivity and dynamic performance, achieving an unstoppable low-frequency experience. Simultaneously, the mid and high frequencies seamlessly align with the harman FR curve, experiencing unprecedented and breathtaking super bass. Tunable Sound-Create 16 Different Audio ProfilesInnovative stacked dual-dynamic drivers structure design. 1*10mm dual magnetic dynamic driver, 1*8mm dynamic driver, and kz castor wired in ear earphones is equipped with professional acoustic filters that support 2-stage adjustments for low frequencies and