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Sản phẩm / D/A, USB D/A
Woo Audio WA7
Mã số: Woo Audio WA7

Woo Audio WA7 Fireflies

Pure Class-A tube headphone amplifier with 32-Bit, 192K USB Digital-to-Analog Converter

Estimated shipping date: 2 to 3 weeks from purchase date.

Owner's Manual(PDF) pdf-icon

USB drivers for Windows XP/Vista/7/8 usb logo

"this little amp sounds powerful" - The Audiophiliac
"This is possibly the most linear DAC and headphone amp I've heard " - Positive Feedback
"the WA7 is practically a steal in terms of
sound quality and physical presentation. " - HP Soundings
"The WA7 is a thing of museum-grade beauty and simplicity." - Ken Rockwell
"The Fireflies is very highly recommended for anyone buying their first,
or even possibly their last, reference amplifier." - Dagogo
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 signal path. The D-A converter is designed to be capable of up to 32-bit/192k 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.
A power-house to drive even the most demanding full-sized headphones, along with a dedicated mini phone jack tailored for in-ear-monitors.Pure tube design without the use of semi-conductors in the amplification circuitry. The 6C45 triode acts as both driver and power tube.
Pure tube design without the use of semi-conductors in the amplification circuitry. The 6C45 triode acts as both driver and power tube.

The USB input supports up to 32/192k high-res playback. The RCA connectors can be used either as analog inputs or as D-A outputs. Both in/out signals are user selectable on the back panel.

The linear external power supply provides pristine energy to the amplifier. It can be placed where ever you please to keep the simplicity of the unit.

A thick block of superior quality, high clarity glass is provided to protect the tubes, while maintaining a clean and elegant aesthetic.Available in Black and Silver with Clear glass.
* Handmade output transformer with Nickel Alloy core
* 32-Bit, 192kHz high resolution playback
* Ultra-low jitter USB 2.0 runs on Asynchronous mode
* High and low impedance output facilitated via toggle switch on back panel
* Open load protection will automatically engage to prevent the amp from damaging when no headphones are plugged in
* Multi-functional switch for USB input, RCA input, and RCA output via D-A.
* The RCA connectors can be used either as RCA analog inputs or USB DAC preamp outputs
* All-aluminum chassis with no screws visible from any viewing angles
* High clarity tube protection glass
* Multi-layer military grade PCBs
* Customized driver for Windows Vista/XP/7/8
* USB Audio Class 2.0 is natively supported by Apple OS X version 10.6.4 and above without installing driver
* Single-ended, class-A, transformers output
* Linear external high-performance power supply (remote-controlled power switching)
* Two 6C45 driver/power tubes
* C-Media 6631 USB chip
* TI PCM5102A 32-bit DAC chip
* Headphones impedance : 8-600 Ohms
* Input impedance: 100 Kilo-Ohms
* Sampling rate: up to 32-Bit, 192kHz
* Inputs: 1 Asynchronous USB2.0, 1 RCA
* Outputs: 1 1/4" and 1 1/8" headphone outputs, 1 RCA (same connector as the input)
* Max output: approx 1 watt @ 32 ohms
* Frequency response: 11Hz to 27kHz, +/-0.5dB
* Distortion: <0.03%
* S/N: 95dB
* Power consumption: 25W max
* Mains supply: 100-120V, 220-240V, 50/60Hz, user selectable
* Finish: Anodized aluminum
* DC cord length: 4.25 ft or 1.3 m
* Dimension: AMP: 4.8" L x 4.8" W x 5.1" H with glass
* PSU: 7" L x 3.5" W x 2.2" H
* Weight: AMP - 5.3 lbs / 2.4kg, Glass - 3.3 lbs / 1.5kg
* PSU - 2.8 lbs / 1.4kg
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