Fezz Audio Lybra 300B Stereo Tube Amplifier
Best tube amplifier for audiophiles seeking rich, warm, and immersive sound.
Experience the rich, immersive sound of 300B tubes with the Fezz Audio Lybra 300B Stereo Tube Amplifier. This unique Parallel Single Ended (PSE) Class A amplifier delivers classic 300B warmth with increased output, making it a versatile choice for a wide range of loudspeakers. It features premium 300B tubes, an automatic bias module for consistent performance, and a redesigned power supply with enhanced toroidal transformers for exceptional linearity and a wide frequency response. The Lybra also includes three RCA inputs for multiple source connections, selectable speaker impedance (4Ω/8Ω), and an anti-vibration design for improved sound quality. Enjoy dynamic, impactful sound with extended tube life thanks to delayed anode voltage switching.
$6995.00
More Lybra Options
Owner Satisfaction
4.6
/ 5
Category Rank
934
/ 1684
#934 in Power Amplifiers
Price vs Category Average
-15%
Below average
Model
Lybra
/ Lybra
Who it's for
- Music lovers craving a spacious, three-dimensional soundstage
- Audiophiles seeking rich, emotionally resonant tube-driven sound
- Design-conscious listeners wanting a striking, elegant centerpiece
Who should skip it
- Owners of low-sensitivity speakers requiring high power
- Budget-focused buyers wary of recurring tube maintenance costs
- Users with limited space or poor ventilation options
Performance breakdown
Sonic Warmth
The 300B tubes deliver that signature lush, liquid midrange magic.
Build Integrity
Heavy-duty chassis and anti-vibration feet ensure a rock-solid, resonance-free foundation.
Maintenance Ease
Automatic bias module removes the headache of manual tube calibration.
Speaker Versatility
Parallel configuration provides enough drive for a wide range of loudspeakers.
Signal Purity
Integrated ground switch effectively eliminates unwanted hum for a silent background.
Frequency Extension
Impressive bandwidth captures deep lows and airy, detailed high-frequency transients.
Key Specs
Model
Lybra
Dimensions
420 x 380 x 226 mm
Net Weight
23.5 kg
Colours
Black, White, Burgundy, Red
Type
Stereo Vacuum Tube Amplifier
Circuit Type
PSE Parallel Single Ended
Tubes
4x 300B, 2x 6SN7, 1x 12AX7, Autobias
Max. Output Power
2 x 15W
Features
- Parallel Single Ended (PSE) circuit with premium 300B tubes
- Automatic bias module for consistent performance
- Backlit logo for elegant visual appeal
- Selectable speaker impedance (4Ω/8Ω) for optimal matching
- Anti-vibration feet for improved sound quality
- Signal ground switch to eliminate hum
- Three RCA inputs for multiple source connections
- Redesigned power supply with enhanced main transformer
What customers say
Customers consistently praise the Fezz Audio Lybra 300B amplifier for its exceptional sound quality, often describing it as warm, detailed, and engaging. Many highlight the amplifier's ability to bring out nuances in music, creating an immersive listening experience. The elegant design and robust build quality also receive frequent commendation, contributing to a premium feel that enhances its appeal. Users appreciate its sophisticated aesthetic and solid construction, making it a centerpiece in their audio setups.
Know before you buy
The PSE design uses two 300B tubes per channel to provide higher output power than a standard single-ended amplifier. This allows the Lybra to drive a wider variety of loudspeakers while maintaining the signature warmth and harmonic richness of the 300B tube.
No, the Lybra features an automatic bias module. This ensures consistent performance and simplifies maintenance, as the amplifier self-regulates to keep the tubes operating within their optimal parameters.
Yes, the Lybra is designed with selectable speaker impedance. You can easily match the amplifier to your specific speakers by choosing the appropriate 4Ω or 8Ω output setting to ensure optimal power delivery.
The Lybra includes a dedicated signal ground switch. If you experience a ground loop hum, toggling this switch can help eliminate unwanted noise and provide a cleaner signal path.
The amplifier utilizes delayed anode voltage switching. This feature prevents the tubes from being hit with full power immediately upon startup, which reduces stress on the components and helps extend the overall life of your 300B tubes.
The Lybra is equipped with three RCA inputs on the rear panel. This allows you to connect up to three different line-level sources, such as a CD player, DAC, or phono stage, simultaneously.
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$6995