AMPLIFIERS
WA7 Fireflies (2nd gen) Single-ended Headphone Amplifier / DAC
WA7 Fireflies (2nd gen) Single-ended Headphone Amplifier / DAC
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Limited time, FREE shipping within CONUS
Designed and assembled in New York, USA
3-year limited warranty [learn more]
Have questions? Contact us.
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Overview
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.
Shown with WA7tp upgrade.
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
No driver required, plug and play with Windows 10 & 11 and all versions of macOS
High-retention USB connector x 1
RCA analog Input x 1
1/4" (6.3mm) stereo headphone output
1/8” (3.5mm) stereo headphone output (recommended for IEMs )
Compatible with full-size headphones and IEMs (8–600 Ohms)
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.
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]
Highlights
*Specifications and appearance are subject to change for improvement without notice.
WA7 Fireflies x 1
SOVTEK 6C45 vacuum tube x 2
Anti-slip glass pads x 4
Solid state power supply x 1
4ft. DC cord for power supply unit x 1
Standard USB-C [OTG] to B cable x 1
U.S. style AC power cord
Quick start guide
UPGRADE:
WA7tp (tube power supply) x 1
1ft. DC cord for tube power supply unit x 1
12AU7 / 5963 vacuum tube x 2
*Audio cables are not included.
In the box
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