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This is a strong deal at USD 675, landing exactly at the lower quartile of recent comparable asks and well below the USD 842 median. For a WA7 Fireflies, that is genuinely attractive money—assuming the listing is complete and the unit is working properly.
The WA7 remains a desirable compact tube DAC/headphone amplifier, valued for its distinctive tube presentation, capable headphone drive, and elegant all-in-one design. The “Cables & Accessories” description makes it worth confirming exactly what is included, especially the external power supply, tubes, and required connection leads; replacements can affect the bargain calculation. Still, at USD 675, even a straightforward, complete example looks like a worthwhile buy rather than merely a fair deal.
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.
