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Woo Audio WA7 Fireflies Gen. 2 Headphone Amplifier and USB DAC - Black

Woo Audio WA7 Fireflies Gen. 2 Headphone Amplifier and USB DAC - Black

No Semiconductors are Used in the Entire Amplification Path

CL SKU 28987
$ 2199 .95

Or 52 Weekly payments from NZD $42.31 what's this?

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The Woo Audio WA7 “Fireflies” Amp/DAC is a combination of high performance vacuum tube headphone amplifier with a built-in USB Digital-to-Analog Converter. It is a pure tube design, utilizing 6C45 tubes in a class-A, single-ended topology, with transformer coupled outputs. There are no semiconductors used in the entire amplification path. The D/A converter is designed to be capable of up to 24-bit/384k sampling rates. This maintains pure data integrity, which is transmitted via standard high speed USB 2.0 interface operating in asynchronous mode.

The high quality construction features include a pair of Nickel Alloy core output transformers, all-aluminum chassis with no screws visible from any viewing angles, a remote-controlled linear external power supply for amplification circuitries, a custom built toroidal power transformer, and multi-layer military grade PCBs.

The dedicated port for in-ear-monitors carries a full range of volume controls ensuring minimal noise. Despite its incredibly compact size, “Fireflies” is a power-house with the capacity to drive almost any demanding audiophile headphones. To accommodate different system setup needs, “Fireflies” can also be used as a stand-alone D/A Converter.

In The Box

  • Quick start guide
  • WA7 Fireflies x 1
  • SOVTEK 6C45 vacuum tube x 2
  • Anti-slip glass pads x 4
  • Solid state power supply x 1 with 4ft. DC cord x 1 [not included, replaced by WA7tp with upgrade]
  • Standard USB A to B cable x 1
  • U.S. style AC power cord


  • WA7tp (tube power supply) x 1 with 1ft. DC cord x 1
  • 12AU7 / 5963 vacuum tube x 2

*Audio cables are not included.



Amplifiers - Headphone Amp/DAC Combos


Woo Audio

Part Number

WA7 Fireflies Bl