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Woo Audio WA2 OTL Headphone Amplifier Selling my Woo Audio WA2 Headphone Amp with Pre Amp Function.Used but In Very Good / Excellent ConditionThis amp is working flawlessly and never missed a beat. Very well looked after - was my first "serious amp" into headfi / audiophile land.Original Owner. Non smoker and no pets.Bought from Addicted to Audio here in SydneyComes in original Woo Audio PackagingIdeal for high impedance hps - eg my HD800 and ZMF high impedance hps, like the Auteur that I used to own. Silky Smooth sound.*** Comes with stock tubes that were hardly used as I moved to upgraded tu
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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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