The JVC SEA-20 is a dynamic equalizer that offers users the ability to enhance their audio experience by adjusting the frequency response of their sound systems. It features multiple preset equalization settings for various music genres, allowing users to easily tailor the sound to their personal preferences. The design of the SEA-20 is both functional and compact, making it suitable for integration into various audio setups. It typically provides sliders for manually adjusting bass, midrange, and treble frequencies, enabling precise sound customization. Additionally, the unit may feature input and output jacks, allowing for straightforward connectivity with other audio devices. Its robust build quality ensures longevity and reliability in performance.