Owner manual

Inc.Allrightsreserved. www.wooaudio.com Rev1.2.April,2013 4

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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

employs a pure tube design, utilizing 6C45 tubes in a class-A, single-ended topology,

with transformer coupled outputs. No semi-conductors used in the entire signal path.

The D-A converter is designed to be capable of up to 32-bit/192k sampling rates. Pure

data integrity is maintained while it 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

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.