HAND-BUILT IN USA • PROTOTYPE SERIES

From Mig
to Mozart!

Wavebourn Audio Research Laboratories

Edelweiss-3 Power Amp Plus — Pure Class A1 single-ended vacuum tube amplification reimagined for the modern audiophile.

Explore the Amp Listen to Reviews
Hand-crafted prototypes
Adjustable output impedance
Featured on The Headphone Experience
Reviewed by Dick Olsher • Blackdahlia • June 2024
THE FLAGSHIP

Wavebourn Edelweiss-3
Power Amp Plus

A high-end, single-ended Class A1 vacuum tube power amplifier designed by Anatoliy Lisovskiy of Wavebourn Audio Research Laboratories.
Pure Class A1 or Assisted SE
Also an exceptional headphone amp
THE EDELWEISS-3 SERIES
Power Amp Plus
IN PRODUCTION
Preamp Plus (20mA headphone output)
COMING SOON
Multiple Power Amp variants
PROTOTYPES AVAILABLE
CHOOSE YOUR CONFIGURATION

Three Distinct Versions

9-PIN TUBES
3W
per channel
Ideal for
96 dB/W/M speakers
Supported Tubes
EL82 SV83 EL84 6P14P 6P15P 6P18P
Watch 3W Demo
MOST POPULAR
OCTAL TUBES
6W
per channel
Ideal for
92 dB/W/M speakers
Supported Tubes
EL34 KT77 KT88 KT120 6L6GC 6CA7
Watch 6W Demo
EXPERIMENTAL
Assisted SE
switchable
6W / 12W
90 dB speakers
True single-ended mode (6W) or assisted single-ended mode (12W). Offers greater flexibility for a wider range of loudspeakers.
Switchable on the fly
Watch Assisted SE Demo
TECHNICAL EXCELLENCE

Key Specifications

Frequency Response
10 Hz – 90 kHz (−3 dB)
Input Sensitivity
0 dB (0.775 V) RCA • 50 kΩ
Output Impedance
Continuously variable −3.8 Ω to +3.8 Ω
Speaker Outputs
4–6 Ω and 8–12 Ω taps
Driver Tube
8CB11 video pentode
Power Supply
MOSFET voltage regulators + Schottky diodes
Bias System
Adjustable auto-bias with digital gauges
Soft Clipping
Asymmetric saturation (musical)
Hand-built in the USA • Sold as prototypes to fund ongoing R&D
PHILOSOPHY

Modern Engineering
Meets Vintage Warmth

Anatoliy Lisovskiy’s designs blend the soul of single-ended triode amplification with precision engineering developed over decades of research.

Three nested feedback loops
Including a bridged current loop that allows continuous adjustment of output impedance — rendering traditional “damping factor” obsolete and giving you active servo-control over your woofers.
The Revelation
“In 2002, after hearing a single-ended triode amplifier, everything I had learned about distortions in audio was based on a misunderstanding. Audibility of distortions does not directly depend on THD as was widely assumed.”
— Anatoliy Lisovskiy, Founder & Designer
Tomsk University of Control Systems and Radio Electronics
WHAT LISTENERS SAY

Performance Highlights

DICK OLSHER • BLACKDAHLIA • JUNE 2024
“Exceptional bass definition and control that challenges the stereotype of weak bass in single-ended amplifiers. Pure, sweet midrange and a transparent soundstage with excellent three-dimensional image focus.”
— On high-sensitivity speakers
THE HEADPHONE EXPERIENCE (YOUTUBE)
“Named Best Headphone Amplifier of 2021. Clean, dynamic, and versatile across sensitive dynamics and demanding planar headphones alike.”
Also drives power-hungry planars with ease
OWNER FEEDBACK
“With efficient speakers and a passive preamp, the adjustable output impedance lets me fine-tune the bass to perfection. The most satisfying amplifier I’ve owned.”
— Multiple owners via forums & private feedback
Want more real user reviews?
Read authentic feedback from Wavebourn owners on Facebook
View All Reviews

Hear It for Yourself

Official demonstration videos from Wavebourn

PROTOTYPE SERIES
$1,800
USD (pre-COVID pricing • subject to change)
All units are hand-built prototypes sold to fund continued research and development. Full production models planned.
Reserve Your Unit
Available via eBay, US Audio Mart, Facebook Marketplace & direct inquiry
LET’S CONNECT

Ready to experience
the Edelweiss-3?

Whether you’re looking for a prototype, have questions about tube rolling, or want to discuss custom configurations — Anatoliy and the Wavebourn team are happy to help.
facebook.com/Wavebourn
CONTACT INFORMATION
Anatoliy Lisovskiy - Wavebourn Contact Card
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