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Woo Audio WA7e Fireflies


Electrostatic Headphone Amplifier / DAC

Choose your power…

The award-winning WA7 Fireflies is now also available for electrostatic headphones. At the heart of the WA7e is a fully-balanced amplifier designed for modern electrostatic headphones from Audeze, STAX, HiFiMan, Dan Clark Audio, and others.

Thanks to the unmistakable elegant look and compact design, WA7e stands out from conventional electrostatic headphone amplifiers. To fit all of the features that users expect and love to use, our engineers developed a complex internal structure with specifically designed custom-made components. The ESS SABRE DAC you know and love makes your music sound incredible and the user-replaceable 12AU7 vacuum tubes can be upgraded at any time to customize the sound to your preference. The built-in linear power supply simplifies system setup and location versatility. The WA7e is also a tube preamplifier allowing you to integrate with home speaker systems or drive a pair of desktop-powered speakers for more ways to enjoy uncompromised sound.

Whether you choose WA7 or WA7e for your headphones collection, great sound runs in the family.

  • Released on February 2023

  • IMPORTANT NOTICE: 580v Electrostatic headphones required [sold separately]

  • Compatible with electrostatic headphones from Audeze, STAX, HiFiMan, Dan Clark Audio and others

  • Compatible with Apple iPhone/iPad, Android devices, Mac and Windows computers, how-to video LEARN MORE

  • Tubes: 12AU7 / 5963 driver tubes, self-biasing

  • Premium Polytetrafluoroethylene (PTFE) tube sockets

  • ESS SABRE Audiophile DAC up to 24-bit/384kHz PCM, and up to DSD256 (11.2MHz)

  • XMOS xCORE-AUDIO asynchronous USB compatible with PC, Mac, Android and iOS devices (with Apple CCK or Android OTG adapter), how-to video LEARN MORE

  • High-retention USB connector x 1

  • RCA analog Input x 1

  • Frequency response: 15-40kHz, -3dB

  • Signal-to-noise ratio: 100 dB

  • Tube preamplifier function (PRE-OUT):

    – 4.4mm (5-pole) by Pentaconn by NIPPON DICS balanced pre-out output (recommended)

    – 3.5mm (1/8”) stereo pre-out

  • Anodized aluminum chassis, available in midnight black or platinum silver

  • External dimensions with glass: 5.25″ (H) x 4.8″ (W) x 6″ (D)

  • Weight: 9 lbs (4.1kg)

  • Internal linear power supply

  • Operating AC voltage: 115v – 230v (voltage below 115v requires step up transformer)

  • Designed and assembled in New York, USA

  • Three-year limited warranty [learn more]