The Nikko EQ-30 M is an audio equalizer designed to enhance sound quality and customize audio output to suit listener preferences. It features a graphic equalizer interface that allows users to adjust frequency bands to achieve desired tonal balance. The EQ-30 M typically includes multiple frequency bands, often ranging from low to high frequencies, thus enabling precise adjustments for bass, midrange, and treble frequencies. It generally has controls that allow for boosting or cutting specific frequency ranges, providing flexibility for a variety of listening environments and musical genres. Additionally, the device may support a range of input and output options, making it suitable for integration into both home audio setups and professional sound systems. Its build quality reflects robust design principles, catering to durability and user-friendly operation. Overall, the Nikko EQ-30 M is appreciated for its functionality and ability to improve audio playback quality.