Woo Audio WA2 Single Ended OTL Headphone Amp

"A Phenomenal Value"

The Woo Audio WA2 is a high performance headphone amplifier that's perfect for even the most power hungry headphones. It uses a singled-ended triode, 'Class A' all-tube-drive OTL (output transformer-less) design for pristine sound quality.

"We're used to the sound of our most highly rated headphones through our existing, impressive-in-their-own-right amplifiers, but the WA2 breathes phenomenal new life into even the greatest headphones on the planet," reports Nate Lanxon at CNET.co.uk. "Highly recommended."

"One Of The Most Musically Involving I Have Heard"

"[The] WA2 is one of the most musically involving amplifiers I have heard, and for the price, awfully close to the state-of-the-art," notes Linden Park, EnjoyTheMusic.com. "It may be unparalleled among the products in the marketplace now and represents a phenomenal value."

"Iron-Fisted Control of Any Headphone"

"One of the highlights of the year. It's quiet beyond the normal noise floor, lifelike musically, soldered by hand, very nicely designed, and fairly priced," notes Matej Isak in a December 2010 review at MonoAndStereo.com.

"[The WA2] has iron-fisted control of any headphone I throw at it, and most importantly – it communicates with me and my emotions," marvels xenithon at head-fi.org.

Meticulously Made Inside and Out

The WA2 is a high quality, meticulously made product inside and out that uses point-to-point wiring throughout its construction. It uses a premium 120-watt toroidal power transformer for quiet, dependable operation with an individual filter choke and rectifier per channel. An Alps potentiometer and power switch plus silver plated Teflon wires add to the performance.

The casework boasts an aluminum die-cast chassis with an anodized finish along with aluminum volume knobs and power switch button.

For smooth, rich audiophile performance, you can't beat the sound of vacuum tubes. The WA2's tube complement consists of two 6AS7/6080 power tubes, two 6922/6DJ8 drive tubes, and two EZ80 rectification tubes.

The Connectivity You Need

You get the connectivity you need with your Woo. It provides four pairs of selectable RCA inputs, and one TRS 1⁄4" stereo headphone jack.

Adventures in Tube Rolling

This Woo Audio product is perfect for tweakers who love to experiment with their gear. Changing the sound quality is as easy as trying a different set of audio tubes as an alternative to the tubes that come standard with your Woo. You’ll find lots of suggestions for ‘tube rolling’ on the Internet on head-fi.org and other audiophile Websites. So roll your own and enjoy!

Handcrafted and Made in the USA

Woo Audio takes great pride in every component that the company designs and manufactures. All products are handcrafted, and they're made in the USA.

Note: AC power cord and interconnect cables are not included with this model.

• Point-to-Point wiring
• Two 6AS7 / 6080 power tubes
• Two 6922 / 6DJ8 drive tubes
• Two EZ80 rectification tubes
• Pseudo-dual power supply
• Four pairs of selectable RCA inputs
• One TRS (1⁄4" or 6.35mm) stereo headphone jack
• Full aluminum die-cast chassis, anodized finish
• Whole aluminum volume knobs and power switch button
• 120 watts toroidal power transformer
• Individual filter choke and rectifier per channel
• Silver plated Teflon-jacketed wires
• Alps potentiometer and power switch
• Silver-plated hook-up wires in Telfon jacket
• Handcrafted
• Made in the USA

Note: AC power cord and interconnect cables are not included with this model.

Overview

• Headphones impedance : 25-600 Ohms
• Input impedance: 100 Kilo-Ohms
• Frequency response: 8 Hz - 100 KHz -3dB
• Signal/Noise: 95 dB
• THD: <= 0.08%
• Pre-amp Gain: 10 dB
• Voltage: Dual AC operation 110/220V, 50/60 Hz
• External dimension: 5-1/2"(H), 13"(W), 9"(D)
• Weight: 17 lbs.

• 310mW @32Ω
• 400mW @60Ω
• 550mW @120Ω
• 640mW @300Ω
• 480mW @600Ω (with 6080 tube)