Douk Audio is a Chinese audio electronics brand operated by Shenzhen Cavins Technology Co., Ltd., focused on affordable Hi-Fi gear for desktop and home listening. The company grew out of its sister brand Nobsound, whose NS-01G mini amplifier helped establish the label's reputation for compact, value-oriented designs. Douk Audio's catalog covers vacuum tube amplifiers, Class A and Class D integrated amps, headphone amplifiers, DACs, phono preamps, audio switchers, and standalone VU meters.

The brand is best known for combining retro-styled tube designs and VU meter aesthetics with hybrid digital amplification. Popular models include the X1 Bluetooth tube amplifier (which pairs JAN5725 tubes with a TDA7498E Class D power stage and includes an MM phono input), the ST-01 Pro tube/DAC integrated amp, the F5 single-ended pure Class A tube amplifier using 6N and 6L6 tubes, and the E2 tube headphone amplifier with XLR, 4.4mm, and 6.35mm outputs.

Douk Audio products are sold primarily direct-to-consumer through its website, Amazon, and eBay, and the company also maintains the One Little Bear sub-brand for smaller DIY-oriented audio components. The brand occupies a niche in the budget Hi-Fi and headphone community as an accessible entry point into tube sound and VU-metered amplification.

Douk Audio has 1 product cataloged on Equipboard, including Mixers. Their gear is featured by 1 artist, with the strongest followings in Electronic, Rock, and Hip Hop. Notable users include emma essex.