Premium Aluminum Frame: a curved anodized black aluminum basket for super rigidity and heat dissipation, outperforming traditional iron frame with durability and reduced resonance for cleaner sound. Highly Power : Delivers impressive 30W power (4Ω impedance) despite 66mm size, combining long throw rubber surround with robust output ideal for speakers and portable bass systems. Neodymium Magnets Systems: Equipped with strong internal neodymium magnets for high sensitivity and control, requiring minimal amplifier power while producing rich music even from battery sources. Durability Voice Coil: Incorporates a 25mm aluminum voice coil for excellent heat resistance, ensuring stable during extended highly power use without risks. Enhanced Bass Design: Curved rubber suspension enables deeper low frequency extension with minimal distortions, perfect for speakers, desktop HiFi, or car music upgrades.