Woo Audio
Woo Audio WA23 LUNA Headphone Amp/Preamp
Best tube amplifier for audiophiles seeking premium sound and elegant design.
The Woo Audio WA23 LUNA is a compact, single-ended, pure Class A tube amplifier and preamplifier that redefines high-end audio aesthetics. Its striking black-and-gold chassis is CNC machined from a single piece of aluminum, featuring elegant curved lines around the volume controller. Hand-assembled by master craftsmen, it utilizes a point-to-point wiring design for uncompromising quality. The amplifier features 6C45 driver tubes, 2A3 power tubes, and a 5U4G rectifier tube, delivering rich details, clean highs, wide dynamic range, and deep bass. It offers user-selectable impedance and level settings for headphones and can function as either a headphone amp or preamplifier.
$8999.00
Owner Satisfaction
4.8
/ 5
Category Rank
15
/ 766
#15 in Headphone Amplifiers
Price vs Category Average
+544%
Above average
Amplifier Type
Single-ended, pure Class A tube amplifier
/ Single-ended, pure Class A tube amplifier
Who it's for
- Audiophiles seeking rich, natural, and highly resolving tube-driven sound
- Listeners owning demanding planar magnetic or high-impedance headphones
- Purists prioritizing maximum channel separation and premium build quality
Who should skip it
- Budget-conscious buyers looking for entry-level or mid-range audio gear
- Users wanting a low-maintenance, cool-running, and cost-effective setup
- Desktop users with limited space for bulky dual-chassis equipment
Performance breakdown
Build Integrity
CNC machined aluminum and point-to-point wiring define true master-level craftsmanship.
Sonic Transparency
Pure Class A circuitry delivers an exceptionally rich and detailed soundstage.
Impedance Versatility
Handles everything from sensitive IEMs to demanding 600-ohm studio headphones effortlessly.
Component Quality
Mundorf capacitors and the ALPS RK50 potentiometer represent the industry gold standard.
Signal Purity
External power supply design effectively isolates noise for a pristine listening experience.
System Flexibility
Seamlessly transitions between a high-end headphone amp and a capable preamplifier.
Key Specs
Amplifier Type
Single-ended, pure Class A tube amplifier
Tube Configuration
2A3 x 2 (Power), 6C45 x 2 (Driver), 5U4G x 1 (Rectifier)
Wiring
Transformer-coupled, Point-to-Point
Capacitors
Mundorf Supreme Silver/Gold, Mundorf MTube
Tube Sockets
Polytetrafluoroethylene (PTFE)
Chassis
CNC machined aluminum
Power Consumption
160 watts
Warranty
Three-year limited
Features
- Single-ended, all-tube, Class A operation
- Striking black-and-gold CNC machined aluminum chassis
- Transformer-coupled, Point-to-Point wiring
- User selectable HI / LO impedance and HI / LO level
- Compatible with 8–600 Ohms headphones
- Versatile headphone and pre-amplifier functions
- Premium ALPS RK50 potentiometer
- External power supply for cleaner signal
What customers say
The Woo Audio WA23 LUNA is widely regarded as an endgame component due to its exceptional sonic performance. Owners consistently highlight the lush, expansive soundstage and remarkable detail retrieval that defines its musicality. This amplifier delivers impressive power, driving demanding headphones with authority and finesse, creating an immersive listening experience. The build quality is flawless, reflecting meticulous craftsmanship that justifies its premium status. While the investment is significant, the profound sonic improvements and sheer enjoyment derived from music overwhelmingly validate the cost. It is viewed as a centerpiece that elevates any headphone system to reference level, offering reliable, benchmark performance.
Know before you buy
Yes, the amplifier is compatible with headphones ranging from 8 to 600 Ohms. It features user-selectable impedance and level settings, allowing you to optimize the output for your specific pair of headphones.
Yes, it is designed to serve as both a high-end headphone amplifier and a preamplifier. It includes XLR pre-out connections, allowing you to integrate it into a larger home audio system to drive power amplifiers or active speakers.
The external power supply unit isolates the electrical noise and interference of the power components from the sensitive audio circuitry. This separation ensures a cleaner signal path, resulting in lower noise floors and improved sonic clarity.
The WA23 LUNA uses a classic tube configuration consisting of 2A3 power tubes, 6C45 driver tubes, and a 5U4G rectifier tube. While these tubes are chosen for their performance, they are consumable items that will eventually require replacement depending on your usage hours.
Point-to-point wiring eliminates the need for printed circuit boards, allowing for shorter, more direct signal paths between components. This hand-assembled approach is often preferred by audiophiles for its superior signal integrity and long-term durability.
The unit features two dedicated headphone outputs: a 4-pin XLR balanced jack and a standard 6.3mm (1/4”) jack. This allows you to easily switch between balanced and single-ended headphone cables.
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$8999