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A balanced tube amp with real cult status, but this asking price is ambitious against the used market. With 16 recent comparables at a US$840 median and US$1,505 at the 75th percentile, US$1,600 sits a bit above the top end, so I’d only call it fair if it includes extras or truly standout condition.
What makes it worth a look is the WA22’s reputation for a big, weighty presentation and strong balanced-drive appeal, especially for headphones that like voltage swing and a bit of tube flavor. If this is clean, properly serviced, and comes with the right tubes, it could still be a satisfying buy for someone specifically chasing that Woo sound; otherwise, at this number, a buyer should ask for condition details, tube complement, and any service history before leaning in.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Woo Audio is a New York-based high-end audio company founded in the mid-2000s, with 2006 widely cited as its launch year. It was built by the Wu family, with Jack Wu as the public face of the brand and key design influence, alongside family members who helped shape the company’s early growth. Its roots are in tube electronics and a strong appreciation for live sound, which has remained central to its identity.
The brand is best known for vacuum-tube headphone amplifiers, especially models such as the WA series, along with electrostatic headphone amplifiers like the WES. Woo also makes a smaller range of speaker amps, plus related audio accessories and cables, while its website and retail focus remain centered on amplification and headphone-oriented listening rather than source components or turntables.
In the market, Woo Audio sits firmly in the boutique high-end niche. It is respected among headphone enthusiasts for handcrafted, valve-based designs, substantial build quality, and a distinctive sonic character often associated with warmth, scale, and refinement. It is not a mass-market brand; instead, it appeals to serious buyers looking for premium, specialized amplification with a strong American-made identity.
See all Woo Audio listings on RADAR.
