Woo Audio WA7 Fireflies

Overview

Nearly a decade ago, we set out to create an attractive, high-performance vacuum tube amplifier that will delight the eyes and ears of music lovers. The original WA7 fireflies headphone amplifier/DAC was born. We are proud to introduce to you the improved 3rd generation of our award-winning WA7 fireflies.

Keeping the same elegant look that makes WA7 fireflies unique, the new 3rd gen now features a built-in linear power supply making the setup a breeze and a one-box solution. In addition, the 3rd gen employs a balanced headphone output driven by a pair of 12AU7 vacuum tubes. The power output is over 1.5w of power per channel @4 Ohms; ideal for a wide range of IEM (in-ear monitors) and power demanding full-sized headphones. The user-replaceable vacuum tubes can be upgraded at any time to customize the sound to the listener's preference. The class-leading performance ESS SABRE DAC allows the user to enjoy music from streaming services such as TIDAL, Qobuz, Apple Music, and Amazon Music HD in lossless resolution.

You asked for it and we listened. The new 3rd gen is also a tube preamplifier enabling the user to integrate WA7 fireflies with their home speakers system or drive a pair of desktop-powered speakers for more ways to enjoy the uncompromised sound. See the quick start guide for all the possibilities of this amazing little cube.

Highlights - Generation 3

• Updated to 3rd generation in Sept 2021

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

• Class-A balanced headphone amplifier and DAC

• Up to 1.5w power output (4.4mm balanced)

• Ultra-low noise for sensitive IEMs

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

• Premium Polytetrafluoroethylene (PTFE) tube sockets

• ESS SABRE Audiophile DAC up to 24-bit/384kHz PCM, and 128DSD/5.6MHz

• 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

• 4.4mm (5-pole) by Pentaconn by NIPPON DICS balanced headphone output (recommended)

• 6.3mm (1/4”) stereo headphone output

• Headphone impedance compatible range 8–600 Ohms

• Frequency response: 10Hz to 46kHz, -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)

  - 6.3mm (1/4”) stereo pre-out

• Anodized aluminum chassis, available in midnight black or silver [coming soon]

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

• Weight: 8.5 lbs.(3.9kg)

• Internal linear power supply

• Global voltage (100v–240v) without converter

• Designed and assembled in New York, USA

• Three-year limited warranty [learn more]

In The Box

• Quick start guide

• WA7 Fireflies 3rd gen x 1

• 12AU7 / 5693 vacuum tube x 2

• Glass with anti-slip silicone glass pads x 4

• Standard USB-C OTG to B cable x 1

• Standard USB-A to USB-B cable x 1

• AC power cord x 1

*Audio cables are not included. 

Highlights - Generation 2

• Updated to 2nd generation in March 2016

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

• Tubes: 6C45 driver/power x2, 12AU7/5963 rectifier x 2 with WA7tp upgrade

• Polytetrafluoroethylene (PTFE) tube sockets

• Singled-ended Triode, Class-A, Transformer-coupled

• ESS SABRE DAC 24 bit, 384kHz PCM, and up to 128DSD

• 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

• 1/4" (6.3mm) stereo headphone output (8–600 Ohms)

• 1/8” (3.5mm) stereo headphone output (for ultra-sensitive IEMs )

• Linear solid state power supply OR upgrade to WA7tp (tube power supply)

• Anodized aluminum chassis, available in black or silver

• Self-biasing with compatible tubes [chart]

• Dimensions: WA7 amp with glass: 5 ¼" (H) x 4.8" (W) x 6" (D) 8.6 lbs. with glass, Solid state power supply: 2.2" (H) x 3.5" W x 7" (D) 2.8 lbs., WA7tp with glass: 5 ¼" (H) x 4.8" (W) x 6" (D) 9.4 lbs.

• Global voltage (100v–240v) without converter

• Designed and assembled in New York, USA

• Three-year limited warranty [learn more]

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

*Audio cables are not included.