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Recent used Fiio K3 asking prices center around US$79, with the lower quartile at US$63 and the upper quartile at US$99. At US$63, this is a strong deal: the bottom end of the observed market rather than merely a fair price, assuming it is complete and functional.
The K3 remains a very capable compact desktop DAC/headphone amp, with clean USB operation, gain and bass-boost controls, a line output, and both 3.5mm single-ended and 2.5mm balanced headphone outs. Its balanced output offers useful extra power, while optical and coaxial outputs add flexibility for a wider system. Check that the USB-C cable is included, the volume control is smooth, and both headphone outputs work, but there is no material pricing concern here.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Fiio, founded in 2007 in Guangzhou, China, emerged as a specialist in portable audio gear, initially crafting components like speakers for brands such as Meizu before launching its own lineup. The name blends "Fi" from hi-fi fidelity with "iO" symbolizing digital one's and zeros, evoking authentic sound and modern convenience, while its Chinese rendering "飞傲" conveys innovative vitality. From modest beginnings, the company expanded into a 15,000-square-meter industrial complex by 2022, solidifying its role as a prolific developer of music-centric electronics.
The brand excels across a broad spectrum of portable and desktop audio categories, with flagship strengths in high-resolution digital audio players (DAPs), USB DACs, portable headphone amplifiers, and in-ear monitors. Its portfolio also encompasses cables, desktop amps, and select speakers, prioritizing versatile, high-performance solutions for on-the-go and home listening without venturing into turntables or large-scale hi-fi systems.
Fiio occupies a commanding mid-tier position in the global audiophile market, renowned for delivering premium sound quality at accessible prices that punch above their weight. Praised by enthusiasts for reliability and value, it appeals to discerning buyers seeking refined portable setups over luxury excess, backed by worldwide distribution and a track record of user-acclaimed innovations.
See all Fiio listings on RADAR.
