Fezz Audio Lybra 300B
Best tube amplifier for audiophiles seeking neutral, high-fidelity musicality.
Experience purist audiophile performance with the Fezz Audio Lybra 300B, a flagship integrated tube amplifier. This amplifier is celebrated for its speed, articulation, and transparency, delivering robust bass without a typical 'tubey' sound. It masterfully balances neutrality with smoothness, offering tight control and avoiding the grayness of solid-state alternatives. Available in Evolution and Legacy versions, the Lybra 300B provides a refined listening experience, built with exceptional quality in the European Union.
$6495.00
More Lybra Options
Owner Satisfaction
4.7
/ 5
Category Rank
421
/ 1688
#421 in Power Amplifiers
Price vs Category Average
-21%
Below average
Class of Operation
PSE Class A
/ PSE Class A
Who it's for
- Design-conscious owners wanting a modern, high-end centerpiece for their system
- Audiophiles seeking authentic, warm, and detailed tube-driven midrange realism
- Listeners prioritizing a quiet, noise-free signal path for critical listening
Who should skip it
- Owners of low-sensitivity speakers requiring high-wattage amplification
- Budget-minded listeners wary of recurring, high-cost maintenance expenses
- Users with limited shelf space or poor ventilation in their setup
Performance breakdown
Sonic Transparency
Delivers an articulate, neutral sound that defies typical tube amplifier stereotypes.
Bass Authority
Provides surprisingly tight, controlled low-end response for a 300B design.
Build Craftsmanship
European manufacturing ensures a robust, high-quality chassis with premium finish options.
Dynamic Range
Class A operation offers smooth, musical transients across a wide frequency spectrum.
Connectivity Versatility
Standard analog inputs are supplemented by optional modern Bluetooth streaming capabilities.
Operational Ease
Includes a remote and tube cage for a user-friendly, safe experience.
Key Specs
Class of Operation
PSE Class A
Power Output
15W per channel
Tube Complement
4x 300B, 2x 6SN7, 1x 12AX7
Frequency Bandwidth
12Hz -60kHz (-3dB)
Total Harmonic Distortion
< 0.25%
Output Impedance
4 and 8 ohms
Dimensions (W x D x H)
420 x 410 x 175 mm
Weight (Evolution)
23.5 kg (52 lbs)
Features
- Flagship integrated tube amplifier performance
- Parallel-Single-Ended Class-A operation
- Fast, articulate, and neutral sound signature
- Maintains musicality with tight bass control
- Includes tube cage and remote control
- Optional modern connectivity upgrades
- Beautifully crafted in the European Union
- Available in distinct Evolution and Legacy aesthetics
What customers say
The Fezz Audio Lybra 300B earns high praise for its exceptional musicality and sonic refinement. Owners consistently celebrate its ability to deliver the classic, emotionally engaging 300B sound, featuring a lush and detailed midrange. A key highlight is the amplifier's impressive soundstage depth and instrumental separation, supported by a remarkably low noise floor. Users appreciate the robust build quality, which rivals much pricier boutique gear. While the 300B design has lower power, pairing the Lybra with efficient speakers yields breathtaking results. This amplifier is viewed as an outstanding value, offering genuine tube magic and reliability for serious listeners.
Know before you buy
Unlike many tube amplifiers that lean into a warm, colored sound, the Lybra 300B is designed for neutrality and speed. It offers the harmonic richness of 300B tubes while maintaining the tight bass control and transparency more commonly associated with high-end solid-state gear.
With 15 watts per channel in a Parallel-Single-Ended Class-A configuration, this amplifier performs best with speakers of moderate to high sensitivity, typically 90dB or higher. It is designed to drive these speakers with exceptional articulation and authority rather than sheer brute force.
The primary difference between the two versions is the aesthetic design and chassis construction. Both versions share the same internal circuitry and performance characteristics, allowing you to choose the look that best fits your home audio setup.
The Lybra 300B features an auto-bias circuit, which simplifies tube maintenance and ensures consistent performance without the need for manual adjustments. This makes it a more user-friendly entry into the world of high-end tube amplification.
The standard unit features three analog RCA inputs for your traditional sources. However, Fezz Audio offers an optional Bluetooth aptX 5.0 module if you require wireless connectivity for streaming from mobile devices or computers.
The included tube cage is designed to protect the glass tubes from accidental damage and prevent direct contact with hot surfaces. While it can be removed for a more open aesthetic, we recommend keeping it installed if you have pets or small children in the home.
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$6495