The Nikko NA-990 is an integrated amplifier that combines both modern design and practical functionality. It is designed to provide a balanced audio experience with low distortion and a wide frequency response. The amplifier features a dual power supply circuit, which helps to reduce noise and improve overall sound quality. It typically offers an output power rating of around 100 watts per channel into 8 ohms and supports multiple input sources, including phono, CD, and auxiliary inputs. The front panel includes controls for bass, treble, balance, and loudness, allowing users to customize their audio experience. Additionally, the unit may include a headphone output, speaker selector, and direct input options. The design usually emphasizes durability, with a solid chassis and quality components to ensure longevity. The overall aesthetics are often minimalist, making it suitable for various home audio setups.