The Story
Woo Audio - WA33 (2nd Gen) Elite Edition
Fully-Balanced Headphone Amplifier
Overview - The Pinnacle of Headphone Amplification
Since its debut in 2017, the WA33 has been recognized as one of the world’s finest headphone amplifiers. As headphone technology evolves and advances, so must the amplifier. Today, we raise the bar with the introduction of WA33 2nd Generation, a new performance benchmark for the next generation of high-end headphones.
Dual Output Modes for Maximum Compatibility
The WA33 2nd Gen offers two discrete output modes, each optimized for a specific headphone type:
HP Mode: Traditional headphones, such as dynamic and planar magnetic
TR Mode: Current-drive for ultra-low impedance True Ribbon headphones
This dual-mode architecture ensures peak performance across a wide spectrum of headphones, without compromise to signal integrity, resolution, or safety.
Feature Set includes:
-
Updated to 2nd generation in May 2025
-
Available in Standard and Elite Edition
-
JPS Alumiloy® internal wires available by request ($2000), contact us
-
User selectable outputs:
-
TR (True-ribbon) direct-drive without interface
-
HP (Traditional headphone)
-
-
Headphone Outputs:
-
4-pin XLR balanced for True-ribbon (TR) without interface
-
4.4mm balanced (Pentaconn®)
-
4-pin XLR balanced
-
6.3mm unbalanced TRS
-
-
Same default tubes for all versions: 6C45 driver x 4, 2A3 power x 4, 5U4G rectifier x 1
-
Self-biasing with compatible tubes [chart]
-
Fully balanced design, Push Pull, Class-A
-
Polytetrafluoroethylene (PTFE) tube sockets
-
TKD (Tokyo Ko-on Denpa) 4-channel balanced smooth potentiometer
-
Transformer-coupled, Point-to-Point wiring
-
Internal Coupling Architecture (ICA)
-
XLR input x 2, RCA input x 1
-
User selectable HI/LO impedance for HP headphone
-
User selectable HI/LO level for two levels of power output
-
Headphones impedance: 0.038—600 Ohms
-
Frequency response: 10Hz— 60kHz, -2dB
-
Current output (TR): 3.3A [optimized for true ribbon technology]
-
Power output (HP): up to 10 watts per channel @32 Ohms [ideal for power-demanding headphones]
-
Signal/Noise: > 95 dB, THD: < 0.05%, 1kHz
-
Anodized aluminum chassis, available in black or silver
Elite Edition
The WA33 (2nd gen) Elite Edition is the result of our further pursuit of unprecedented performance. Our experienced engineers have selected the best internal components and materials from intensive research and development. Elite Edition embodies a harmonious balance between sophisticated design and technological excellence to satisfy the most demanding music lovers.
Elite Edition Adds:
-
Ultra high-bandwidth, low-loss output transformers custom-made with Single Crystal Copper wires and Ni Alloy metal
-
Single Crystal copper hook-up and signal wires are used throughout
-
ALPS RK50 4-channel balanced potentiometer in brass enclosure
-
Mundorf MCap Supreme Silver/Gold capacitor for interstage coupling, one per channel (4pcs)
-
Mundorf MTube capacitors for voltage filter (3pcs)
-
Cardas Audio XLR and WBT RCA connectors
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Woo Audio - WA33 (2nd Gen) Elite Edition
Fully-Balanced Headphone Amplifier
Overview - The Pinnacle of Headphone Amplification
Since its debut in 2017, the WA33 has been recognized as one of the world’s finest headphone amplifiers. As headphone technology evolves and advances, so must the amplifier. Today, we raise the bar with the introduction of WA33 2nd Generation, a new performance benchmark for the next generation of high-end headphones.
Dual Output Modes for Maximum Compatibility
The WA33 2nd Gen offers two discrete output modes, each optimized for a specific headphone type:
HP Mode: Traditional headphones, such as dynamic and planar magnetic
TR Mode: Current-drive for ultra-low impedance True Ribbon headphones
This dual-mode architecture ensures peak performance across a wide spectrum of headphones, without compromise to signal integrity, resolution, or safety.
Feature Set includes:
-
Updated to 2nd generation in May 2025
-
Available in Standard and Elite Edition
-
JPS Alumiloy® internal wires available by request ($2000), contact us
-
User selectable outputs:
-
TR (True-ribbon) direct-drive without interface
-
HP (Traditional headphone)
-
-
Headphone Outputs:
-
4-pin XLR balanced for True-ribbon (TR) without interface
-
4.4mm balanced (Pentaconn®)
-
4-pin XLR balanced
-
6.3mm unbalanced TRS
-
-
Same default tubes for all versions: 6C45 driver x 4, 2A3 power x 4, 5U4G rectifier x 1
-
Self-biasing with compatible tubes [chart]
-
Fully balanced design, Push Pull, Class-A
-
Polytetrafluoroethylene (PTFE) tube sockets
-
TKD (Tokyo Ko-on Denpa) 4-channel balanced smooth potentiometer
-
Transformer-coupled, Point-to-Point wiring
-
Internal Coupling Architecture (ICA)
-
XLR input x 2, RCA input x 1
-
User selectable HI/LO impedance for HP headphone
-
User selectable HI/LO level for two levels of power output
-
Headphones impedance: 0.038—600 Ohms
-
Frequency response: 10Hz— 60kHz, -2dB
-
Current output (TR): 3.3A [optimized for true ribbon technology]
-
Power output (HP): up to 10 watts per channel @32 Ohms [ideal for power-demanding headphones]
-
Signal/Noise: > 95 dB, THD: < 0.05%, 1kHz
-
Anodized aluminum chassis, available in black or silver
Elite Edition
The WA33 (2nd gen) Elite Edition is the result of our further pursuit of unprecedented performance. Our experienced engineers have selected the best internal components and materials from intensive research and development. Elite Edition embodies a harmonious balance between sophisticated design and technological excellence to satisfy the most demanding music lovers.
Elite Edition Adds:
-
Ultra high-bandwidth, low-loss output transformers custom-made with Single Crystal Copper wires and Ni Alloy metal
-
Single Crystal copper hook-up and signal wires are used throughout
-
ALPS RK50 4-channel balanced potentiometer in brass enclosure
-
Mundorf MCap Supreme Silver/Gold capacitor for interstage coupling, one per channel (4pcs)
-
Mundorf MTube capacitors for voltage filter (3pcs)
-
Cardas Audio XLR and WBT RCA connectors
