Woo Audio WA6 (2nd gen) Headphone Amplifier

"Very Well Balanced" Headphone Amp

The WA6 from Woo Audio is a high performance all-tube headphone amplifier whose big performance belies its compact size. Its hallmark is realistic, warm, smooth sound. The versatile design drives a wide range of full-sized headphones and in-ear monitors. It uses a singled-ended triode, 'Class A' all-tube-drive, output transformer-coupled design.

Unlike many other headphone amps on the market that make partial use of vacuum tube circuitry, but otherwise are solid state designs, the WA6 boasts an all-tube design. There are no transistors, ICs, or semi-conductors anywhere in the entire circuitry.

"Can Make Good Headphones Shine"

"I think the Woo 6 is a great amp that with a good source can make good headphones shine," reports George Chronis in his Head-fi.org review for February 8, 2007. "Very well balanced, very audible difference from my previous setups."

"With a creamy, natural sound and tight bass response, along with pro-grade build quality to match, we're sure any serious music lover would enjoy this fabulous piece of audio bliss," notes ApartmentTherapy.com.

"Overall clarity is excellent, it sounds natural and the sound is clean/undistorted without a morsel of off sound or graininess," says WalkGood in a March 21, 2009 review for AnythingButiPod.com.

Beautiful Inside and Out

The WA6 is a high quality, beautifully made product inside and out that uses point-to-point wiring throughout its construction. It uses a premium custom-made 80-watt toroidal power transformer for quiet, dependable operation. Silver plated wires in a Teflon jacket 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 WA6's tube complement consists of two 6DE7 drive/power tubes and one 5AR4 rectifier tube.

No-Nonsense Connectivity

You get no-nonsense connectivity with your Woo. It provides one pair of RCA inputs and one 1⁄4" stereo headphone jack. A high/low headphone impedance switch ensures compatibility with a wide range of headphones.

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!

Assembled in Brooklyn, New York, USA

Woo Audio takes great pride in the fact that its products are assembled in Brooklyn, New York, USA from foreign and domestic components.

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

• Point-to-Point wiring
• One 5AR4 rectifier tube (direct substitute: 5U4G)
• Two 6DE7 drive/power tubes
• Pseudo-dual power supply
• All tubes – no semi-conductors in the entire circuitry
• High or low headphone impedance switch
• One 1/4" headphone jack
• 80-watt custom toroidal power transformer
• Aluminum die-cast chassis with an anodized finish
• Aluminum volume knob and power switch button
• Gold-plated RCAs
• Silver-plated hook-up wires in Telfon jacket
• Handcrafted
• Assembled in the USA

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

• Headphones impedance: 8-600 Ohms
• Input impedance: 100 Kilo-Ohms
• Frequency response: 20 Hz - 30 KHz, -3dB
• Signal/Noise: 93 dB
• THD: <= 0.3%
• Voltage: AC 110/220 V, 50/60 Hz
• External dimension: 6"(H), 5½(W), 13"(D)
• Weight: 13.5 lbs

"The WooAudio6 is one of my favorite amplifiers. Somehow it was able to get a great synergy with two headphones with almost an opposite character: both the Sennheiser HD650 and the Grado HF2. If you listen to a lot of Jazz, RnB, Pop, and Vocal, you’ll definitely love the WooAudio6."

- Mike, Headfonia, November 19, 2009

"Woo Audio’s WA6 headphone amp is powerful medicine. Its sweet, euphonic sound gets the most out of headphones that have an emphatic treble, though it also gets along with headphones that have an uncompromising, across-the-board clarity."

"...with the right playmates, the WA6 delivers a creamy, grit-free tone that’s not likely to be heard with any solid-state amp."

- Mark Fleischmann, Sound & Vision, October 24, 2014

"Overall clarity is excellent, it sounds natural and the sound is clean/undistorted without a morsel of off sound or graininess."

- WalkGood, AnythingButiPod.com, March 21, 2009

"The Woo Audio WA6 Special Edition headphone amp is built to Ferrari levels of quality and performance. Even before I listened to it, I knew it was going to be amazing."

- Steve Guttenberg, CNET, July 29, 2008

"I think the Woo 6 is a great amp that with a good source can make good headphones shine. Very well balanced, very audible difference from my previous setups, clear difference from the Presonus, no noise. This is without any break in at all on my part and stock tubes (except 12 hours that Jack [Wu] said he did)."

- George Chronis, Head-fi.org, February 8, 2007

"With a creamy, natural sound and tight bass response, along with pro-grade build quality to match, we're sure any serious music lover would enjoy this fabulous piece of audio bliss."

- ApartmentTherapy.com