A headphone amplifier is a device designed to boost the audio signal sent to headphones, enhancing sound quality and volume. It is particularly useful for high-impedance headphones, which require more power to deliver optimal performance. By providing a stronger signal, headphone amplifiers can improve clarity, detail, and overall listening experience. These amplifiers can be standalone units or built into other devices like smartphones and audio interfaces. They come in various forms, including portable models for on-the-go use and desktop versions for home setups. Using a headphone amplifier can significantly enhance the enjoyment of music and other audio content.