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New pricing has varied, but this is a particularly strong used buy at US$110: it sits below the US$85–US$464 middle-market span’s lower quartile threshold? Actually, it is above the 25th percentile but still less than half the US$236 median, making it clearly attractive rather than merely fair. Assuming it is the ESS version and works properly, the price leaves plenty of room for a good purchase.
The K5 Pro ESS remains a capable desktop all-in-one, combining an ES9038Q2M DAC with USB, optical, coaxial, and RCA inputs, three gain settings, and up to 1.5 W into 32 ohms. It has enough output for demanding headphones and useful RCA line outputs for a speaker or amplifier setup. Since the condition is unknown, confirm the power supply, clean volume control, working inputs, and headphone output; with those checks passed, this is an easy recommendation at US$110.
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.
