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US$949 is a fair price for a used Woo Audio WA7 Fireflies, sitting just below the 75th percentile of US$949 and near the median of US$846 from recent comparable listings. It’s not a bargain, but it’s squarely in the fair market range for this model in the used USD market.
The WA7 Fireflies is a beloved, cube-sized class-A tube amp with a built-in 32-bit/192kHz USB DAC, delivering warm, analog-rich sound that pairs beautifully with high-impedance and planar headphones. Its compact design, dual-tube topology, and original-owner appeal make it a standout for enthusiasts seeking tube magic without a bulky rig. At US$949, this listing offers solid value for a well-regarded piece that still commands attention in today’s market.
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.
