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[NEW] WA7d (1st gen) Fireflies Duo
[NEW] WA7d (1st gen) Fireflies Duo
NOS [New Old Stock], One (1) at this price
1-year limited warranty [learn more]
Limited time, FREE shipping within CONUS
Designed and assembled in New York, USA
Have questions? Contact us
Specials are on a first come basis. Returns are not accepted.
Comments and Reviews
Overview
The Woo Audio WA7d “Fireflies Duo” Amp/DAC with optical (TOSLINK) input 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/192kHz 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 (sold separately).
1st gen model with optical (TOSLINK)
Solid-state power supply
Compatible with Apple iPhone/iPad, Android devices, Mac and Windows computers, how-to video LEARN MORE
Tubes: 6C45 driver/power x 2
Singled-ended Triode, Class-A, Transformer-coupled
Optical (TOSLINK) Input x 1
USB-B 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)
Anodized aluminum chassis
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.
Operating AC voltage: 115v – 230v (voltage below 115v requires step up transformer)
Designed and assembled in New York, USA
One-year limited warranty [learn more]
Highlights
WA7d (1st gen) Fireflies Duo x 1
4ft. DC cord for power supply unit x 1
SOVTEK 6C45 vacuum tube x 2
Anti-slip glass pads x 4
Standard USB-C [OTG] to B cable x 1
AC power cord
Quick start guide
*Audio cables are not included.
In the box
Recommended
Matched pair (2) tubes
Free shipping within CONUS
Have questions? Contact us.
Power supply upgrade [requires WA7 or WA7d]
Limited time, FREE shipping within CONUS
Have questions? Contact us.
Resources
STOP… Windows 10 build 1607 or newer version does NOT need to install the driver. In a playback application, the WA7 DAC should show up as WooAudio WASAPI.
FREE premium headphones stand [choose in cart]
FREE shipping within CONUS
Have questions? Contact us.