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Woo Audio WA11 Topaz DAC / Headphone amp The WA11 delivers an audiophile sound quality that rivals many desktop systems and with the features users dream of. Weighing at 413g and 24mm thick, the WA11 Topaz is a battery-powered, fully-balanced headphone amplifier and DAC running in a Class-A topology. It is capable of driving the most demanding full-size headphones while maintaining an ultra-low noise floor for reference in-ear monitors. The DAC is an ESS Sabre capable of decoding PCM up to 24-bit/384kHz and up to DSD128. There is also a 4.4mm balanced input for use with balanced sources such
A$1,000 is a strong deal, sitting well below the 25th percentile of A$850–A$2,260 and under the median of A$1,221 for recent AUD listings.
The WA11 Topaz is a highly regarded portable DAC/amp praised for its fully balanced topology, robust build, and enough power (up to 1.2W) to drive difficult headphones. Its internal rechargeable battery offers about six hours of runtime, making it ideal for travel. At this price, you’re getting a rare, original-owner unit in a model that retails new around A$2,100–A$2,500 depending on region. With no listed condition issues and a price that signals genuine value, this is a clear buying opportunity for enthusiasts seeking top-tier portable performance without the new-unit markup.
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.
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