DUNU Top Sound is a Chinese high-end audio manufacturer founded in 1994 and headquartered in Dongguan, China, specializing in the development and manufacturing of premium in-ear monitors (IEMs) and earphones. The company has over 30 years of experience in audio engineering, initially starting as an ODM/OEM establishment producing products for major global audio and telecommunications brands before launching their own DUNU brand. DUNU is owned by TopSound, a Taiwanese parent company, creating a unique cross-strait partnership in audio manufacturing. Since establishing their comprehensive production factory with full in-house driver development capabilities in 2006, DUNU has become recognized in the audiophile community for their hybrid driver configurations, combining multiple balanced armature and dynamic drivers in their IEM designs. The company operates with complete production lines including precision equipment, B&K frequency machines, IMD sputter, CNC machines, and anechoic chambers, enabling them to create premium, high-resolution audio products for demanding audio enthusiasts. DUNU's mission centers on constant innovation for audiophiles and music lovers, establishing themselves as a respected Chinese brand in the global high-end audio market with business operations conducted Monday through Friday, 9:00 AM to 5:00 PM (UTC +8).