PaiAudio (stylized π Audio) is a Chinese audio company based in Shenzhen that designs and manufactures in-ear monitors and earbuds. The brand focuses on the budget-to-mid-tier IEM segment, building configurations that range from single dynamic-driver models to multi-driver hybrid designs that combine Knowles and Sonion balanced armatures with dynamic drivers.

Its catalog spans flat-style earbuds, all-BA IEMs, single-DD models, and hybrid IEMs. Notable products include the DR2 and DR2 Pro single dynamic-driver IEMs, the MR3 and MR4 balanced-armature models, the PR1, and the PDM4 (3BA + 1DD) and PDM7 (6BA + 1DD, 14-driver) hybrid IEMs. Distribution outside China is handled largely through specialty retailers such as Penon Audio and online marketplaces like AliExpress and eBay.

PaiAudio is better known within Chinese audiophile circles than in the wider Western market, and its products are most often discussed on enthusiast communities like Head-Fi rather than through mainstream music-gear channels.

PaiAudio has 1 product cataloged on Equipboard, including Headphones & In-Ear Monitors.