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This is a strong deal at USD 45. The six recent sold comparables put the market median at USD 236, with the lower quartile at USD 85, so this ask sits comfortably below even the 25th-percentile level. Assuming it is genuinely in excellent working condition, the price is bargain territory.
The E17K remains a useful little all-rounder: it combines USB DAC, coaxial digital input, line input/output, headphone amplification, digital volume, and adjustable bass, treble, and gain. It can deliver roughly 15 hours per charge and has enough output for many portable and moderate-impedance headphones. At USD 45, the only sensible checks are that the battery still holds charge and that the proprietary coax adapter and charging cable are present; even without every accessory, this is an unusually attractive buy.
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.
