With its high quality sound performance and enhanced bass, the KHP21v is ideal for listeners seeking headphones with a big sound that wears comfortably and travels light. The KHP21v is equipped with dynamic elements. Anisotropic ferrite magnets mean the KHP21v can really turn up the volume, even with low-voltage portable devices. Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound. To improve bass performance, block outside noise, and minimize sound leakage, closed leatherette ear cushions seal lightly around the ears.