Kii Audio is a German manufacturer of advanced active loudspeakers based in Hamminkeln-Dingden, Germany. Founded in 2014, the company was co-founded by Bruno Putzeys, the engineer behind Hypex's NCore Class-D amplifier technology and the Grimm Audio LS1 monitor, alongside colleagues with senior backgrounds at companies like Digidesign, TC Electronic, Grimm Audio, and SSL. The brand is built around a fusion of DSP, Class-D amplification, and proprietary cardioid dispersion technology aimed at neutralizing room reflections.

The flagship Kii THREE is a fully active six-way reference monitor that fits a six-driver, multi-amplified system into a roughly 20 cm wide cabinet, with low-end response reaching down to about 20 Hz. The larger Kii THREE BXT extends the system as a floorstanding configuration with additional drivers and amplification, while the Kii SEVEN is a more compact active monitor with both wired and wireless connectivity for studio and high-end home use. The Kii CONTROL unit serves as a dedicated digital preamp and USB interface for the speaker line.

Kii Audio occupies a niche at the intersection of mastering-grade studio monitoring and high-end home audio. Its products are commonly discussed in mixing and mastering circles for their cardioid pattern control, which reduces sidewall and rear-wall coloration in less-than-ideal rooms, and they are stocked through pro audio dealers such as Vintage King and KMR Audio.

Kii has 2 products cataloged on Equipboard, including Active & Passive Monitors. Their gear is featured by 3 artists, with the strongest followings in Pop, Hip Hop, and K-pop. Notable users include Jacob Collier, RM, and JHope.