Welcome to our in-depth Fezz - Lybra 300B - Integrated Tube Amplifier Review. If you’re craving the warm, spacious clarity of 300B triode sound, the Fezz Lybra 300B is your ticket to audiophile heaven. Meticulously built to order with an approx. 6-week lead time, this amplifier blends bespoke craftsmanship with cutting-edge circuit design.

Design & Build Quality

The Fezz Lybra 300B exudes premium build quality from every angle. Its toroidal transformers are custom-wound to ensure exceptional linearity and a wide frequency response of 12 Hz–60 kHz (−3 dB). The chassis arrives in a suite of elegant finishes—Big Calm, Black Ice, Burning Red, EverGreen, Moonlight, Republika and Sunlight—so you can match your décor or make a bold statement. At 23.5 kg and with dimensions of 420 × 380 × 226 mm, it feels reassuringly substantial without overpowering your rack.

Sound Signature & Performance

Powered by 4 × 300B, 2 × 6SN7 and 1 × 12AX7 tubes in a Parallel Single-Ended (PSE) Class A topology, the Lybra 300B delivers 2 × 15 W of pure triode magic. The result is a free, spacious and deeply involving presentation with harmonics that remain under 0.25% THD. A delayed anode voltage switching circuit extends tube life and protects your investment. Bass is tight yet textured, mids bloom with organic warmth, and highs shimmer without glare.

Customisation & Optional Add-Ons

Every Fezz Evolution Gen 1 amplifier is bespoke. At checkout, you can tailor your Lybra 300B with these factory-installed options:

• RC – Motorised volume control for effortless adjustments
• HT Pre Input – Integrate seamlessly into an existing home theatre as a power amp
• BT – Bluetooth 5.0 module for high-res wireless streaming
• SO – Subwoofer line-out (2 × RCA) for expanded low-end control

Technical Specifications

• Max. output power: 2 × 15 W (PSE Class A)
• Output impedance: 4 Ω / 8 Ω
• Inputs: 3 × RCA
• Frequency response: 12 Hz–60 kHz (−3 dB)
• Harmonic distortion (THD): < 0.25%
• Power consumption: 180 W
• AC fuse: 3.15 A T
• Tubes: 4 × 300B, 2 × 6SN7, 1 × 12AX7 (autobias)
• Dimensions: 420 × 380 × 226 mm; Weight: 23.5 kg

Who Should Consider the Fezz Lybra 300B?

If you are a dedicated audiophile seeking that last mile of sonics, the Lybra 300B is designed for you. It’s ideal for:

• Lovers of vinyl and high-resolution digital sources
• Enthusiasts who value build-to-order exclusivity and finish options
• Listeners craving organic midrange warmth coupled with airy, extended highs
• Those integrating a high-end stereo system or a hybrid home theatre setup

Pros & Cons

• Pros:
  • Rich, natural 300B triode character
  • Exceptional build quality and multiple finishes
  • Low distortion and wide frequency response
  • Extended tube longevity via delayed anode switching
  • Customisable add-ons for maximum flexibility
• Cons:
  • 15 W per channel may limit ultra-low sensitivity speakers
  • Built to order with a ~6-week lead time (worth the wait for bespoke audio)

Elevate Your Listening Experience

If you’re ready to immerse yourself in the lyrical beauty of 300B tubes, our team at The Audio Tailor is here to help. Explore the Fezz Lybra 300B Integrated Tube Amplifier product page for more details, or call us on 1300 308 711 to discuss your perfect configuration. You can also email us at sales@theaudiotailor.com.au—we’ll tailor a solution that fits your space, system and sonic aspirations.