The EQ4 plug-in was crafted by Cliff Maag with a focus on achieving exceptional audio clarity and a natural sound. It delivers transparent equalization with an emphasis on enhancing high-frequency presence, making it ideal for refining vocal and instrumental tracks. This plug-in is a precise emulation designed for UAD hardware and Apollo interfaces, capturing the unique character of the original analog unit.

Drawing inspiration from the iconic NTI EQ3 from the 1980s, the EQ4 features the signature 'Air' Band control, known for adding bright, musical sparkle without introducing harshness or hiss. This control has been a key element in high-profile productions, contributing to the vocal textures on albums such as Madonna’s Ray of Light and Celine Dion’s Taking Chances. The Air Band allows users to inject life into tracks with ease, enhancing vocals, acoustic guitars, and drum overheads.

Beyond its high-frequency enhancement, the EQ4 enables broad, musical equalization moves that preserve the integrity of the original sound source. It offers a straightforward interface with a five-position Air Band control that quickly adds presence and vitality to dull recordings. This makes it a valuable tool for producers seeking to elevate their mixes with a smooth and natural top-end boost.