Woo Audio
Woo Audio WA7 Fireflies (3rd generation)
Best tube-driven desktop centerpiece for audiophiles seeking rich, customizable sound.
Experience superior audio with the Woo Audio WA7 Fireflies (3rd generation), a premium headphone amplifier, preamplifier, and DAC. This elegant desktop unit features dual 12AU7 vacuum tubes and an ESS SABRE DAC for rich, detailed sound. Enjoy seamless integration with your audio sources via USB or RCA inputs. The WA7 also serves as a versatile tube preamplifier, perfect for driving powered speakers or a separate power amplifier. Its user-replaceable tubes allow for personalized sound tuning, making it a flexible centerpiece for any high-fidelity audio setup.
$1189.15
More WA7 Fireflies Options
Owner Satisfaction
4.5
/ 5
Category Rank
400
/ 766
#400 in Headphone Amplifiers
Price vs Category Average
-15%
Below average
Amplifier/Preamplifier/DAC
73
/ WA Fireflies (rd Generation)
Who it's for
- Audiophiles seeking a warm, immersive, and natural listening experience
- Minimalists wanting a high-performance, space-saving desktop audio solution
- Design enthusiasts who value premium build quality and classic aesthetics
Who should skip it
- Budget-conscious listeners wary of recurring tube maintenance expenses
- Commuters or travelers requiring a battery-powered portable device
- Casual listeners looking for an entry-level or affordable audio upgrade
Performance breakdown
Sonic Warmth
Dual vacuum tubes deliver a rich, organic texture to every track.
DAC Precision
ESS SABRE architecture ensures exceptional clarity and high-resolution digital decoding.
Build Integrity
Anodized aluminum chassis provides a robust, premium feel on any desk.
Tube Customization
User-replaceable tubes offer endless possibilities for fine-tuning your signature sound.
Connectivity Versatility
Seamlessly bridges digital sources and analog speakers with balanced output options.
Power Delivery
Internal linear power supply provides clean, stable energy for demanding headphones.
Key Specs
Amplifier/Preamplifier/DAC
WA7 Fireflies (3rd Generation)
Compatibility
Apple iPhone/iPad, Mac and Windows computers, Android devices
Amplifier Type
Class A balanced headphone amplifier and DAC
Output Power
Up to 1.5W (4.4mm balanced)
Tubes
12AU7/5963 driver tubes
DAC
ESS SABRE audiophile DAC up to 24-bit/384kHz PCM and up to DSD256
USB
XMOS xCORE-AUDIO asynchronous USB
Driverless
Windows 10 & 11, macOS
Features
- Upgraded 3rd generation with built-in linear power supply.
- Balanced headphone output powered by 12AU7 tubes.
- High-fidelity ESS SABRE DAC for lossless audio.
- Functions as a tube preamplifier.
- User-replaceable tubes for sound customization.
- Plug-and-play USB connectivity.
- Premium anodized aluminum build.
- Versatile input and output options.
What customers say
Customers consistently praise the Woo Audio WA7 Fireflies 3rd generation for its exceptional sound quality, often describing it as warm, detailed, and engaging, elevating their listening experience. The amplifier's elegant design, featuring visible glowing tubes and premium materials, also receives high marks for its aesthetic appeal and robust build. Users appreciate its ability to drive a wide range of headphones, delivering a refined audio performance that justifies its premium positioning in the market.
Know before you buy
Yes. The WA7 functions as a high-fidelity DAC via its USB input and serves as a tube preamplifier through its 4.4mm balanced or 3.5mm unbalanced pre-out ports, allowing you to connect it to powered speakers or a separate power amplifier.
No, the WA7 is driverless for Windows 10/11 and macOS. It uses asynchronous USB connectivity, so you can simply plug it into your computer and it will be recognized as an audio device immediately.
The 12AU7/5963 vacuum tubes are user-replaceable, which allows you to experiment with different tube brands to fine-tune the sound signature to your preference. Always ensure any replacement tubes are compatible with the 12AU7/5963 specification.
The 4.4mm balanced output is designed for headphones terminated with a Pentaconn plug. It provides up to 1.5W of power, making it an excellent choice for driving demanding, high-impedance headphones that benefit from the increased power and channel separation of a balanced signal.
The 3rd generation WA7 features an upgraded internal linear power supply. This design provides cleaner, more stable power to the internal components compared to external switching supplies, which helps reduce noise and improves the overall clarity of the audio.
Yes, the WA7 is compatible with Apple iPhone/iPad and Android devices. You will typically need a USB camera adapter or an appropriate OTG cable to establish the digital connection between your mobile device and the unit's USB input.
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Ready to buy?
$1189