Woo Audio - WA7 Fireflies (2nd Gen) Amp/DAC

Product SKU: WA7

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Product Details


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.

  • Updated to 2nd generation in March 2016

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

  • Polytetrafluoroethylene (PTFE) tube sockets

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

  • ESS SABRE 24 bit, 384kHz DAC

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

  • 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

  • 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

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

UPGRADE:

  • WA7tp (tube power supply) x 1 with 1ft. DC cord x 1

  • 12AU7 / 5963 vacuum tube x 2

*Audio cables are not included. 

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