RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
Selling my Fosi Audio BT20A Pro in like-new condition. It has seen very little use and works flawlessly. Pick up in Greenville, SC or ship within CONUS.This is not the standard Amazon version. I ordered it directly from the Fosi Audio website and customized it with the upgraded 48V GaN power supply, which provides more clean power, better dynamics, improved headroom, and allows the amplifier to deliver its full performance. This is why it’s priced higher than the standard models you’ll find on Amazon with the lower-powered power supplies. I paid $150 for this set.The sound quality is outstanding- crystal clear, detailed, and surprisingly powerful. It drives speakers effortlessly with plenty of volume while remaining clean and distortion-free, making it an excellent choice for music lovers looking for high-end sound without spending a fortune.Features:* Fosi Audio BT20A Pro integrated amplifier* Upgraded 48V GaN power supply (factory option from Fosi Audio)* Bluetooth and RCA inputs* Like new condition* Barely used* Fully functional with no issuesIf you’re comparing prices, please keep in mind that this is the premium 48V GaN configuration, not the entry-level version sold by most retailers.Feel free to message me with any questions.
At US$120, this sits above the US$97 median for recent used comps and also clears the US$105 75th percentile, so it reads ambitious rather than a bargain. It is not wildly off, but it is priced a bit above the typical market for this amp based on your own database.
What makes it worthwhile is the model itself: the BT20A Pro is a compact, well-liked Class D integrated amp that’s valued for clean everyday power, simple setup, and good performance for desktop or small-room systems. If it comes with the original power supply and is genuinely clean, the extra spend can still make sense for a buyer who wants a straightforward, modern amp; at this price, though, I’d want it to be complete and well cared for rather than just “working.”
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.
