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The E3 is a notably tiny, no-frills portable amp, and at US$40 it is a strong bargain by this listing set: well below the US$78 25th-percentile price and far under the US$368 median. That makes it an easy low-cost punt if the unit is confirmed working.
Its appeal is practical rather than audiophile-grand: one AAA battery, very small dimensions, useful extra drive for older or harder-to-drive headphones, and a switchable bass boost. The supplied mini-to-mini cable is worth checking for, though, and test for clean operation before buying; the E3 can hiss with sensitive in-ears and offers fixed gain rather than volume control. At this price, those limitations are manageable, and a working example is a worthwhile secondary or nostalgic portable setup.
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.
