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Woo Audio WA22 (Gen 1) Headphone Amplifier Hi, I'm the original owner of this Woo Audio WA22 Class A push pull fully balanced headphone amp. This is a Gen1 version which doesn't have the preamplifier output on the back, but is more powerful. Give me more power over a pre any day. This will run pretty much any set of headphones. It has driven my Audeze and Hifiman headphones superbly, albeit they're incredibly different animals. It's from Woo so you know it's quality, built in the USA (11 kgs!). All tubes are upgraded and NOS. I purchased the amp about 10 years ago. Usage for the firs
Is A$2,500 a bargain for a used Woo Audio WA22, or just a fair entry into a legendary tube amp? At A$2,500, this listing sits just below the typical used market median, which generally ranges from A$2,200 to A$2,800 based on recent US listings converted to AUD (roughly $1,400–$1,800 USD). Since the current new price is A$4,200 ($2,699 USD), you’re saving nearly A$1,700 on a fully balanced, transformer-coupled design that’s still an audiophile favorite for its rich, spacious sound and preamp versatility.
This is a worthwhile buy because the WA22 2nd Gen delivers exceptional power (up to 2W with 7236 tubes), handles impedances from 8–600Ω, and includes premium tubes like the 6080. Its all-tube, fully balanced architecture offers a warm, organic tone that few modern amps match, and the added preamp outputs make it a system centerpiece. If the unit is in clean, original-owner condition with all tubes intact, A$2,500 is a solid opportunity—no need to overthink it unless the listing hints at missing accessories or questionable age.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Hifiman traces its origins to 2005, when Dr. Fang Bian, a chemist with a lifelong passion for audio electronics, founded Head-Direct in the United States as an online retailer and headphone developer. By 2007, he rebranded to Hifiman, relocating manufacturing and R&D to Tianjin, China, while maintaining sales operations in the US and beyond. This fusion of American entrepreneurial drive and Chinese production expertise propelled the brand from modest in-ear monitors to global prominence.
The company specializes in high-end headphones, particularly planar-magnetic and electrostatic models renowned for their detail and soundstage, alongside complementary portable digital audio players, headphone amplifiers, and cables. Early milestones like the 2009 HM-801—the first pocket-sized high-resolution player—and the HE-5 planar headphones established its innovative edge, with co-founder Binwu He pioneering planar technology integration.
Hifiman commands a elite position in the audiophile market as a high-end leader, delivering reference-grade performance that rivals legacy brands. Its products earn consistent acclaim for transparency and musicality, appealing to discerning buyers seeking uncompromising planar transduction without vintage pretensions or mid-tier compromises.
See all Hifiman listings on RADAR.
