Woo Audio
Woo Audio WA7 Fireflies 3rd Gen
Best tube amplifier for audiophiles seeking a premium, compact desktop setup.
Experience exceptional audio with the Woo Audio WA7 Fireflies 3rd Gen, an award-winning vacuum tube amplifier and DAC. This elegant device combines a rich, detailed soundstage with a premium ESS SABRE DAC, driven by high-quality vacuum tubes. The 3rd generation features an integrated linear power supply and a balanced headphone output for a pure, powerful listening experience. Its versatile functionality as both a headphone amplifier and a preamplifier makes it a central component for any high-fidelity audio setup, compatible with a wide array of headphones and devices.
$1069.82
More WA7 Fireflies Options
Owner Satisfaction
4.5
/ 5
Category Rank
400
/ 766
#400 in Headphone Amplifiers
Price vs Category Average
-23%
Below average
Tubes
1275963
/ AU / driver tubes, self-biasing
Who it's for
- Audiophiles seeking a warm, rich, and immersive listening experience
- Minimalists wanting a sleek, space-saving desktop audio solution
- Design-conscious listeners who value premium craftsmanship and aesthetics
Who should skip it
- Users preferring a low-maintenance, set-and-forget audio system
- Listeners working in small, poorly ventilated desk environments
- Budget-focused buyers looking for entry-level audio gear
Performance breakdown
Sonic Warmth
Vacuum tubes deliver a rich, organic texture that defines the listening experience.
DAC Precision
The ESS SABRE chip ensures high-resolution clarity and exceptional digital detail.
Build Integrity
Anodized aluminum and glass construction feels substantial and looks stunning on desks.
Drive Versatility
Handles a wide impedance range with ease, from sensitive IEMs to headphones.
Signal Purity
Integrated linear power supply minimizes noise for a clean, black background.
System Flexibility
Dual functionality as a preamplifier makes it a versatile desktop centerpiece.
Key Specs
Tubes
12AU7 / 5963 driver tubes, self-biasing
DAC
ESS SABRE up to 24-bit/384kHz PCM, 128DSD
USB
XMOS xCORE-AUDIO asynchronous
Headphone impedance range
8–600 Ohms
Frequency response
10Hz to 46kHz, -3dB
Signal to noise ratio
100 dB
Power output
1.5W per channel at 4 Ohms
Internal linear power supply
Features
- Pure tube sound, no semiconductors in signal path
- Built-in linear power supply for cleaner audio
- Balanced and standard headphone outputs
- User-replaceable tubes for sound customization
- High-performance ESS SABRE DAC
- Tube preamplifier for speaker systems
- Premium anodized aluminum and glass build
- Compact, desktop-friendly design
What customers say
Customers consistently praise the Woo Audio WA7 Fireflies 3rd Gen for its exceptional sound quality, delivering a warm, detailed, and engaging audio experience that elevates their listening. Its elegant, compact design and premium build materials also receive high marks, often described as a beautiful centerpiece for any desktop audio setup. Users appreciate the craftsmanship and the noticeable improvement in audio fidelity, making it a beloved component for serious audiophiles.
Know before you buy
Yes, the 3rd Gen features both a 4.4mm balanced output and a standard 6.35mm headphone jack, allowing you to connect a wide variety of headphones without needing adapters.
Absolutely. The amplifier is designed to handle headphones ranging from 8 to 600 Ohms, providing enough power to drive demanding studio-grade gear with ease.
Yes, the WA7 uses user-replaceable 12AU7/5963 tubes. You can experiment with different tube brands or types to subtly alter the warmth and character of the sound to better suit your personal preferences.
Yes, it features an RCA pre-out, allowing you to use the high-quality internal ESS SABRE DAC and tube stage to feed an external power amplifier or active speakers.
The built-in ESS SABRE DAC supports high-resolution audio up to 24-bit/384kHz PCM and 128DSD, ensuring your digital library is handled with high fidelity.
No, the WA7 Fireflies 3rd Gen is designed with a global voltage power supply (100v–240v), making it compatible with power outlets worldwide without the need for external voltage converters.
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$1070