Fezz Audio Lybra MK2 Mono Tube Power Amp Pair - Moonlight

Fezz Audio Lybra MK2 Mono Tube Power Amp Pair - Moonlight

This pair of dedicated tube monoblocks brings Parallel Single-Ended 300B amplification to a system with an external preamplifier. Each amplifier uses two directly heated 300B output tubes and proprietary toroidal output transformers, with a separate chassis for each channel. The redesigned signal path is designed to preserve fine tonal detail while delivering a spacious stereo image, a richly textured midrange, and smooth high-frequency reproduction. This version features the Moonlight (silver) finish.

RCA and XLR inputs accommodate different preamplifier connections, and speaker terminals support 4Ω and 8Ω loads. Automatic bias regulation maintains the tube operating conditions without manual bias adjustments, while a warmup delay circuit protects the tubes during startup. Black tube cages are included, making the pair a practical foundation for a dedicated tube-based stereo system.

• Pair of mono vacuum tube power amplifiers for separate left and right channels
• Parallel Single-Ended architecture with dual 300B output tubes in each monoblock
• 2 × PSVane 300B L UK Plus power tubes per amplifier
• 2 × 6SN7 UK Plus driver tubes and 1 × Genalex GZ34 rectifier tube per amplifier
• Proprietary toroidal output transformers
• RCA and XLR inputs
• Speaker connections for 4Ω and 8Ω loads
• Automatic bias regulation and tube warmup delay circuit
• Frequency response: 6Hz–38kHz (−3dB)
• THD: less than 3% at 1kHz and full power
• Damping factor greater than 10; input impedance: 50kΩ
• Dimensions: 420 × 380 × 226mm per amplifier
• Designed for use with an external preamplifier
• Supplied as a pair with black tube cages
• Finish: Moonlight (silver)

• 2 × mono power amplifiers with specified tube complements
• Black tube cages