RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
This is a buyer’s market: at US$110, it’s a strong deal against recent used asking prices. That’s below the US$120 25th-percentile figure and well under the US$137 median, making this a bargain rather than merely fair—assuming the unit works and includes its power supply.
The ZA3 is a particularly capable little power amp: clean, controlled Class D output, switchable stereo/mono operation, balanced XLR/TRS and RCA inputs, a subwoofer output, and useful 12V trigger support. With the proper 48V supply, it can deliver substantial power for its size; pairing two in mono is also a legitimate upgrade path. The only thing worth confirming at this price is that the correct supply is included, since that materially affects output. Otherwise, US$110 is an easy recommendation.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Fosi Audio emerged in January 2017 from a modest 10-square-meter office in Shenzhen, China, founded by Ryan Huang and a partner driven by the conviction that high-fidelity sound should be accessible without elite pricing. The brand represents the new wave of Chinese audio manufacturers challenging the traditionally expensive import-dominated hi-fi market. In less than a decade, the company has grown from a confidential startup to an internationally recognized player, now operating from an R&D center spanning over 2,300 square meters and holding more than 100 patents.
Fosi Audio's product portfolio spans the full spectrum of hi-fi components, with particular strength in compact amplifiers and digital-to-analog converters that deliver disproportionate performance for their price point. The brand manufactures integrated and multi-channel amplifiers, DACs, headphone amplifiers, preamplifiers including phono stages, passive subwoofer modules, speakers, headphones, and cables. This comprehensive range reflects a deliberate strategy to serve both entry-level enthusiasts and experienced audiophiles seeking value-oriented solutions rather than feature-laden complexity.
The brand occupies a distinctly mid-tier, value-conscious position in the market, distributed across more than 150 countries and frequently ranking atop Amazon's hi-fi charts. Fosi's reputation rests on pragmatic engineering—delivering compelling sound quality through efficient, optimized electronics rather than pursuing systematic upscaling. The company sells directly through its website, Amazon, and AliExpress, backing products with lifetime technical support and a 24-month warranty, positioning itself as an accessible gateway into serious hi-fi rather than a luxury or boutique concern.
See all Fosi Audio listings on RADAR.
