Woo Audio WA24 Headphone Tube Amplifier – 20th Anniversary Edition

A Milestone in Audio Excellence

Introducing the Woo Audio WA24 20th Anniversary Edition, a headphone tube amplifier that embodies two decades of Woo Audio’s passion for innovation and craftsmanship. First conceived in 2004, Woo Audio has consistently set the standard for high-performance amplifiers. To celebrate their 20th anniversary, they have designed the WA24 as a reference-level amplifier that takes everything they’ve learned from over 20 years of audio engineering to deliver a sonic experience like no other. With its elegant design, cutting-edge technology, and world-class performance, the WA24 is Woo Audio’s finest creation to date.

Redefining the Listening Experience

The WA24 20th Anniversary Edition redefines what it means to enjoy music. Engineered with a unique single-ended, all-tube design and built with precision components, this amplifier is designed to immerse listeners in an expansive soundstage with stunning clarity. From the delicate whispers of acoustic guitar strings to the thunderous depth of bass notes, every nuance of your favorite music comes to life in vivid detail. The WA24’s exceptional sound performance allows you to experience your music the way the artist intended—pure, precise, and free of distortion.

Groundbreaking Innovation: The STEP-UP Driver

One of the most significant innovations in the WA24 20th Anniversary Edition is Woo Audio’s proprietary STEP-UP Driver. This in-house developed transformer eliminates the need for traditional active drivers like vacuum tubes or transistors. The STEP-UP Driver, built with a nano-crystalline core and oxygen-free copper wiring, simplifies the amplification process, significantly reducing interference and enhancing sonic performance. The result is unmatched accuracy, delivering clean, precise amplification with the lowest noise floor ever achieved in a Woo Audio amplifier.

Precision in Every Component

The WA24 is built with meticulous attention to detail. At its foundation are four custom-made 3A/109E vacuum tubes, selected for their durability and low-noise characteristics. These direct-heated triode power tubes ensure smooth, linear amplification, bringing out the full range of dynamics in any recording. The oversized output transformers, a hallmark of Woo Audio’s design, maximize power delivery and dynamic range, making the WA24 capable of driving even the most demanding headphones with ease.

Impeccable Craftsmanship and Design

Every aspect of the WA24 20th Anniversary Edition has been designed with both form and function in mind. The two-tier chassis, precision-machined from a single block of high-grade aluminum, isolates the tube amplifier from the linear power supply, reducing internal noise and microphonics. The sleek black-and-gold anodized finish, along with the sandblasted texture, gives the amplifier an elegant yet robust appearance. Even the tactile experience has been considered—its brass-enclosed ALPS Alpine RK50 volume potentiometer provides smooth, precise control over your listening levels.

Performance Meets Versatility

The WA24 20th Anniversary Edition is designed for versatility. With multiple headphone output options—including 4-pin XLR, 4.4mm Pentaconn®, 6.3mm, and 3.5mm jacks—it’s compatible with a wide range of headphones and in-ear monitors (IEMs). Whether you’re using a flagship full-sized headphone or high-sensitivity IEMs, the WA24 delivers a quiet, noise-free background, ensuring an optimal listening experience for any setup. Its ultra-low noise floor allows for a crystal-clear presentation, even at low volumes, making it ideal for audiophiles who prioritize accuracy and precision.

A New Standard in Tube Amplification

The WA24 20th Anniversary Edition represents a new frontier in tube amplification technology. Featuring point-to-point wiring, a Class-A zero-feedback circuit, and self-biasing capabilities, this amplifier is engineered for long-term reliability and top-tier sound. The high-quality components—such as PTFE-insulated silver-coated OFC hook-up wires and WBT RCA connectors—are selected to achieve the purest sound possible. Every detail has been carefully considered to ensure the amplifier delivers the best possible performance, making the WA24 a standout product in Woo Audio’s lineup.

Designed and Assembled in New York

Proudly designed and hand-assembled in New York, USA, the WA24 20th Anniversary Edition reflects Woo Audio’s commitment to high-end craftsmanship. Each unit is meticulously inspected and tested to meet the company’s stringent quality standards, ensuring that every amplifier delivers unparalleled sonic performance. Backed by a three-year limited warranty, the WA24 is a long-lasting investment for those who seek the ultimate in headphone amplification.

Technical Specifications

In The Box

• WA24 20th Anniversary amplifier x 1
• 3A/109E vacuum tube x 4
• Quick start guide

*AC power cord and audio cables are not included