Woo Audio
Woo Audio WA2
Best tube amplifier for audiophiles who enjoy customizing their sound signature.
The Woo Audio WA2 is a high-performance, single-ended, Class A, all-tube-drive OTL headphone amplifier designed for demanding headphones. It features meticulous point-to-point wiring, a toroidal power transformer, and premium components like an Alps potentiometer. The amplifier utilizes two 6AS7/6080 power tubes, two 6922/6DJ8 drive tubes, and two EZ80 rectification tubes for a smooth, rich audiophile sound. With four selectable RCA inputs and a 1/4" headphone jack, it offers versatile connectivity. This handcrafted USA-made amplifier is ideal for those who enjoy experimenting with tube rolling to customize their listening experience.
$1499.00
Owner Satisfaction
4.7
/ 5
Category Rank
53
/ 766
#53 in Headphone Amplifiers
Price vs Category Average
+7%
Above average
Headphones impedance
25600
/ - Ohms
Who it's for
- Audiophiles seeking a warm, immersive, and natural listening experience
- Design-conscious listeners wanting a sophisticated, high-end desktop centerpiece
- Tinkerers who enjoy customizing their sound through tube experimentation
Who should skip it
- Purists who demand strictly neutral and analytical audio reproduction
- Casual listeners on a budget looking for entry-level gear
- Users wanting a low-maintenance, cool-running, and durable solid-state device
Performance breakdown
Sonic Transparency
OTL design delivers a remarkably clean and liquid midrange presentation.
Tube Rolling Potential
Extensive tube compatibility allows for endless fine-tuning of the sound signature.
Build Integrity
Handcrafted point-to-point wiring ensures exceptional durability and signal purity.
Impedance Versatility
Handles a wide range of headphones from 25 to 600 Ohms.
Input Flexibility
Four RCA inputs provide ample connectivity for complex analog setups.
Component Quality
Premium parts like the Alps potentiometer ensure precise, long-term performance.
Key Specs
Headphones impedance
25-600 Ohms
Input impedance
100 Kilo-Ohms
Frequency response
8 Hz - 100 KHz -3dB
Signal/Noise
95 dB
THD
<= 0.08%
Voltage
Dual AC operation 110/220V, 50/60 Hz
External dimension
5-1/2" (H), 13" (W), 9" (D)
Weight
17 lbs
Features
- Point-to-point wiring for superior sound quality
- Handcrafted and Made in the USA
- Tube rolling capability for sound customization
- Premium components including toroidal transformer and Alps potentiometer
- Durable aluminum die-cast chassis
- Four selectable RCA inputs
- Single 1/4" (6.35mm) stereo headphone jack
- OTL (output transformer-less) design for pristine sound
What customers say
Customers consistently praise the Woo Audio WA2 for its exceptional sound quality, often describing a rich, warm, and detailed audio experience that elevates their listening. Many highlight the amplifier's robust build and elegant design, noting its premium feel and aesthetic appeal as a centerpiece for any audio setup. The craftsmanship and sonic performance are frequently cited as key reasons for its high regard among audiophiles, making it a cherished component for serious listeners.
Know before you buy
The WA2 is designed to drive a wide range of headphones with impedances between 25 and 600 Ohms. Its OTL design is particularly well-suited for high-impedance dynamic headphones, providing a rich, tube-driven sound signature.
Yes, the WA2 is designed with tube rolling in mind. You can experiment with different 6AS7/6080 power tubes, 6922/6DJ8 drive tubes, and EZ80 rectifier tubes to fine-tune the sonic characteristics to your personal preference.
No, the WA2 is a single-ended amplifier and does not feature balanced outputs. It is equipped with a standard 1/4" (6.35mm) stereo headphone jack.
The WA2 features four selectable RCA inputs, allowing you to connect up to four different analog source components simultaneously and switch between them as needed.
No, the WA2 is strictly a dedicated headphone amplifier and does not include preamp functionality for external speaker systems.
The Output Transformer-Less (OTL) design removes the output transformer from the signal path, which helps reduce distortion and phase shift. This results in a cleaner, more transparent, and highly detailed sound quality.
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