With its high quality sound performance and enhanced bass, the Solo is ideal for listeners seeking headphones with a big sound that wears comfortably and travels light. The Solo is equipped with dynamic elements for an extended frequency response from 20-18,000 Hz. Anisotropic ferrite magnets mean the Solo 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. An inline volume control allows you to conveniently adjust the sound levels while listening.