Overview

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.

Highlights

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: Mundorf MCap Supreme Silver/Gold input coupling caps (matched pair) 0.15uf/600V, Mundorf MLytic HV double-capacity electrolytic capacitors 100u x 3, Mundorf MLytic HV double-capacity electrolytic capacitors 220u x 4
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 (with tube & clearance for ventilation): Amplifier: 12"(H), 9"(W), 17"(D) 35 lbs., Power supply unit: 12"(H), 9"(W), 17"(D) 35 lbs.
Designed and assembled in New York, USA
Three-year limited warranty [learn more]

In the box

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

Woo Audio WA5 (2nd gen) Headphone/Integrated Amplifier