Woo Audio 2 High End Headphone / Pre Amplifier

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WA2 - top model OTL headphones amplifier

WA2 has a superb ability to render harmonics and acoustics. I feel like I hear more of the overtones of acoustical instruments, which produces a richer sound, but more importantly, they sound more like the same instruments sound in real life in a real space.

If we had to pick a single word to describe the Woo Audio experience, it would be 'luscious' -- deep, smooth bass, rich vocal reproduction, and a sweet, spacious, notably airy treble that's smashing for live classical performances. -CNET U.K.

I heard this amp at the National meet and it is a winner. It rocked with RS-1s amd makes a great preamp as well. - By jp from head-fi.org

Let me tell you that the WA2, armed with the Tung-Sol 5998s, is one imposing through wonderfully elegant statement product that conveys quality long before you plug in your first set of cans. I could not help but sit in my chair and admire the look of this product...I loved the sound of this recording on the WA2 with stock tubes on my AKG K701s. The trumpets and sax featured an open, airy and enveloping property that I found to be entralling. Highs were well defined and clear, without being over powering.

Very clear and all around a very involving listen which are both very important to me. I don't analyse hardware very much. I just like to get maximum enjoyment, which I am definitely getting.

* Power cord and interconnection cables are not included.

* 1 pair of 6AS7/6080, and 1 pair of 6922/6DJ8 are included.

* Shopping cart applies to the U.S. buyers only. International buyers please contact us for shipping cost and payment instruction.

Technical Specifications:

Headphones impedance : 30-600 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: AC 110/220V, 50/60 Hz
External dimension: 5½"(H), 13"(W), 9"(D)
Weight: 17 lbs

Standard Features:

Point-to-Point wiring
Two 6AS7 / 6080 [PDF] power tubes
Two 6922 / 6DJ8 [PDF] drive tubes
Two EZ80 [PDF] rectification tubes (6X4 is no longer used)
Pseudo-dual power supply
One pair of gold-plate pre-amp RCA outputs
Four pairs of selectable gold-plate RCA inputs
¼" stereo headphone jack
Full aluminum die-cast chassis, anodized finished
Whole aluminum volume knobs and power switch button
120 watts toroidal power transformer
Individual filter choke and rectifier per channel
Rubycon and WIMA capacitors
Teflon wires
Alps potentiometer and power switch

Parts upgrade:
Premium parts upgrade package. $400

We carefully selected the best possible audiophile graded parts that bring the ultimate performance from the amplifier. Parts upgrade are intended for amplifier purchase, not to be sold on a standalone basis.

Blackgate output coupling capacitors, 220u/100v
Blackgate voltage filtering capacitors, Power Tank 220uf/200V

Attenuator upgrade:
DACT CT2 stepped attenuator. $215

24-position, high accuracy and reliability

Teflon tube sockets upgrade:
$150 (9-pin x4, 8-pin x2)
Teflon is a superior material with great isolation and tempreture endurance. The unique design of multiple pin contact area greatly increase connectivity and gripping. Pins are gold-plated over oxygen free copper.

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Power tubes upgrade:
Tungsol 7236 NOS
Hand-pick matched pair $110 (2 pcs)

One of the best power tubes available for this amp. The 7236 vastly improves dynamic and soundstage. It has a very good speed, warm mid range, tight and deep bass. Buy and ship separately.

Driver tubes backup:
Hand-pick matched pair
Philips 6922 JAN $40 (2 pcs)

Low noise, smooth. Military grade, Joint Army Navy (JAN) tube. Buy and ship separately.

WA2 is a high performance headphone amplifier for even the most power hungry headphones.High gain, ultra low noise preamp.

WA2 is a high performance headphone amplifier for even the most power hungry headphones.
High gain, ultra low noise preamp.