KZ, short for Knowledge Zenith, is a Chinese audio company founded in 2008 and based in Dongguan, Guangdong, operated by Dongguan Yuanze Acoustics Technology Co., Ltd. The company was started by Keith Yue, an audio engineer, and Zen Li, a classically trained musician, with a focus on producing in-ear monitors and earphones at accessible price points.

The brand specializes in wired and wireless in-ear monitors using a range of driver technologies, including dynamic, balanced armature, hybrid (dynamic + balanced armature), and planar magnetic configurations. KZ introduced its hybrid driver designs in 2014, which became a signature approach across much of its lineup. Well-known models include the ZS10 Pro, ZS6, AS16, Zenith, and the Gale, the latter marketed toward gaming use.

KZ products are distributed globally through platforms such as AliExpress, Amazon, and specialty audio retailers like Linsoul and HiFiGo. The brand has a strong following in budget audiophile and IEM enthusiast communities, where its earphones are frequently discussed and compared on forums like Head-Fi for offering multi-driver configurations at lower price tiers than many established headphone manufacturers.

KZ Audio has 8 products cataloged on Equipboard, including Headphones & In-Ear Monitors. Their gear is featured by 1 artist, with the strongest followings in Electronic and Rock. Notable users include Pavel Kozlov.