While metallic speaker cones offer advantages such as high sound velocity and optimal rigidity, they often tend to produce a distinct coloration in sound. Additionally, they are prone to generating parasitic noises (unwanted resonance outside the original playback signal).

Magnesium features the lowest specific gravity of all practical metals—two-thirds that of aluminum and two-fifths that of titanium—while offering exceptional vibration-damping properties. NIPPON KINZOKU provides magnesium alloy strips with a minimum thickness of just 0.044 mm, making them suitable for all types of diaphragms, from tweeters (high-frequency) to mid-range and bass units. Our materials are already widely utilized in high-quality earphones and headphones.