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WA5 (2nd gen) Headphone/Integrated Amplifier

Woo Audio WA5 2nd gen amplifier
Woo Audio WA5 2nd gen amplifier

WA5 (2nd gen) Headphone/Integrated Amplifier

  • BTO, ships in 2–3 weeks
  • Add 3% for international orders


WA5 has been setting the standard for 300B-based all-tube stereo amplifiers among music lovers since 2008. The WA5 features separate speaker and headphone amplifiers in two discrete amplification sections to achieve the highest performance in both forms of usage. The power supply is divided into different units to ensure that the audio signal is pristine and isolated, and advanced output switching enables the user to select speaker or headphone output effortlessly. It is the most versatile amplifier for high-efficiency speakers and any dynamic/planar headphones.

Unique to WA5 is the user-customizable headphone output (HI/LO power, HI/LO impedance, and HI/LO level) located on the front panel. When used in conjunction, the user can optimize the synergy between amplifier and headphones to achieve the ideal pairing and performance. At maximum, headphone outputs get full eight watts per channel – easy to satisfy the needs of any demanding headphones.

To tailor different user requirements, we also offer a headphone-only model – WA5-LE – which boosts the same headphone circuitry and functions as the WA5.

  • Updated to 2nd generation in August 2015
  • Tubes: 6SN7 driver x 2, 300B power x 2, 5U4G rectifier x 2
  • Polytetrafluoroethylene (PTFE) tube sockets
  • Single-ended Triode, Class-A
  • Transformer-coupled, Point-to-Point wiring
  • Pseudo-dual power supply, dual chassis design
  • Audiophile-grade premium internal parts upgrade adds the following: V-Cap CuTF input coupling caps (matched pair) 0.15uf/600V, Blackgate bypass (6SN7 cathode) caps 150uf/350V, Jensen decoupling caps, 100u/500V, Jensen voltage filtering caps, 220uf/450V
  • WBT Nextgen speaker binding posts and RCA
  • User selectable HI/LO headphone POWER
  • User selectable HI/LO headphone IMPEDANCE
  • User selectable HI/LO headphone LEVEL
  • XLR input x 1, RCA input x 2
  • 4-pin XLR and 1/4" (6.3mm) stereo headphone outputs
  • Speaker binding posts x 2 pairs (left and right channels)
  • ALPS smooth potentiometer
  • Anodized aluminum chassis, available in black or silver
  • Self-biasing with compatible tubes [chart]
  • Global voltage (100v–240v) without a converter
  • Dimensions: Amplifier: 8½"(H), 9"(W), 17"(D) 35 lbs., Power supply unit: 8½"(H), 9"(W), 17"(D) 35 lbs.


 *Specifications and appearance are subject to change for improvement without notice.

*Specifications and appearance are subject to change for improvement without notice.

  • Quick start guide
  • WA5 headphone and speakers amplifier x 1
  • WA5 power supply x 1
  • Umbilical DC cord x 1
  • 6SN7 vacuum tube x 2
  • 300B vacuum tube x 2
  • 5U4G vacuum tube x 2

*AC power cord and audio cables are not included

In the box


Driver Tube Upgrade

Rectifier Tube Upgrade 1

Takatsuki TA-274B Tube (In Pair)

Rectifier Tube Upgrade 2

Rectifier Tube Upgrade 3

Power Tube Upgrade 1

Takatsuki TA-300B Tube (In Pair)

Power Tube Upgrade 2

Power Tube Upgrade 3


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