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The K11 is a notably capable compact DAC/headphone amp, and £89 is a fair-to-strong used price rather than an ambitious one. Your 56-listing sample puts the median at £78, with the middle half running from £70 to £88, so this sits just above the 75th-percentile figure—reasonable if it is clean and complete, but not an outright bargain.
Its appeal is practical: a neutral, detailed presentation, plenty of power for most headphones, three gain settings, USB/optical/coaxial inputs, and both 6.35mm single-ended and 4.4mm balanced outputs. The balanced output offers particularly useful headroom for demanding headphones, while RCA line-out adds flexibility for powered speakers or a larger amplifier. At this price, check that the external 12V supply is included and that the display, volume control, and both headphone outputs work properly; otherwise, a lower offer would be justified.
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.
