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WooAudio WA7 2nd Gen Fireflies Desktop Headphones Tube Amplifier

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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.

Fireflies also allows the option of rolling (changing)  tubes  to satisfy all tastes of sound signatures for all audiophiles, it also comes with an upgraded tube power supply unit and a selection of 2 colours, please use the drop down menu on the right to choose your preference and please note that for some upgraded models a longer delivery period might be required,

  • Pure Class-A tube headphone amplifier
  • Built in 24-Bit, 384K USB Digital-to-Analog Converter 
  • Solid state power supply
  • Handmade output transformer with Nickel Alloy core
  • High and low impedance output facilitated via toggle switch on back panel
  • Pure tube design without the use of semi-conductors in the amplification circuitry.
  • The RCA connectors can be used either as analog inputs or as D-A outputs
  • All-aluminum chassis with no screws visible from any viewing angles
  • High clarity tube protection glass
  • Option to upgrade power supply to full vacuum tube model 
  • Elegant and compact design 
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Technical Specification

  • Type: Desk top Headphone Vacuum tube Amp/DAC 
  • Tubes: Two 6C45 driver/power tubes
  • Frequency Response: 11-27,000 Hz 
  • Headphones impedance : 8-600 Ω
  • S/N: 95dB
  • Distortion: <0.03%
  • Max output: approx 1 watt @ 32 ohms
  • Weight: AMP - 2.4kg, Glass -1.5kg,  PSU - 1.4kg
  • Inputs: 1 Asynchronous USB2.0 / 1 RCA
  • Outputs: 6.4mm  High gain / 3.5mm Low gain  
  • Warranty: 1 year

What Is In The Box

  • WA7 Fireflies AMP/DAC
  • 2 6C45 tubes
  • Clear Glass cover
  • Cleaning cloth 
  • Silicon pads
  • SS power supply unit 

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Manufacture Description

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.

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