Lejonklou Boazu 2 | Integrated Amplifier

An integrated amplifier with ZERO features — and everything that matters

Lejonklou Boazu 2 is a ZERO-feature integrated amplifier built around the Source First principle. Swedish, music-first design curated by Authentic High End.

The Lejonklou Boazu 2 is an integrated amplifier with ZERO features — and a stunning ability to communicate music.

At Authentic High End, Boazu 2 represents one of the purest expressions of Lejonklou’s philosophy: remove everything that interferes with the signal, and the music becomes more alive. No menus. No modes. No options. Just music, amplified with authority and emotional clarity.

Why ZERO Features?

The idea behind Boazu was born in 2015, when Fredrik Lejonklou began questioning a long-held assumption: that sensitive low-level analogue signals must always be separated from high-current power amplification.

With new ideas on how to combine both successfully, he set out to design an integrated amplifier that could outperform traditional pre/power combinations — not by adding clever features, but by removing them.

Boazu (named after the Sami word for reindeer) went through multiple iterations. Early prototypes included familiar conveniences: a phono stage, headphone output, pre-outs. Each was carefully tuned. Yet something was missing.

Listening sessions were shorter. The music didn’t fully take over.

So Fredrik did the opposite of what most designers would do:
he removed features, one by one.

Each step towards simplicity resulted in greater musical expression. When nothing unnecessary remained, Boazu finally had ZERO features — and it became not just different, but better.

Source First: The Core Principle

At the heart of Boazu 2 lies the Source First principle.

Source First recognises that the earliest part of the signal chain matters most. Musicians matter more than instruments. Recordings matter more than playback equipment. And within a hi-fi system, the source matters more than the amplifier, which in turn matters more than the loudspeakers.

Most systems — and most buyers — focus on speakers. But all listening experience shows that the closer you are to the source, the greater the musical impact.

In Boazu, this philosophy is taken literally.

Input Stage: Where the Music Begins

Boazu 2 has four analogue inputs — and they are the most important part of the amplifier.

Instead of using traditional input switching, Fredrik simplified the design by adapting the input stage of the Sagatun preamplifier. All four inputs are summed into a single, ultra-clean circuit. Whatever source is playing, it is passed directly and purely to the rest of the amplifier.

• No input selector

• No switching circuits

• No signal degradation

There is nothing to choose, nothing to read, nothing to distract you.
You simply play music.

Volume Control: The Only User Function

After the input stage, the signal passes through an analogue volume control, identical in concept to the one used in Lejonklou’s reference preamplifiers.

This is the only user interaction on Boazu 2:

• Volume up

• Volume down

• Mute

Accessible via the front panel or the supplied Lejonklou remote.

Every other function was removed — because each additional feature degrades the sound just a little. Remove enough “just a little” degradations, and what remains is something far more powerful: musical thrill.

Power Amplifier: Authority Without Aggression

Closely integrated with the volume control is a power amplifier section derived from the Tundra power amplifier.

• High current capability

• Exceptional control

• Effortless drive of real-world loudspeakers

To make Boazu cost-effective without sacrificing musical integrity, component values are chosen just outside the extremely narrow selection window used for Tundra. The result retains the same character, timing and authority — without the cost escalation.

Boazu 2 uses:

• A 1.1 kg copper heatsink (chosen over aluminium for its clear musical advantages: cleaner, better-timed bass)

• Dual 100 W switch-mode power supplies, identical in concept to Tundra

The amplifier never sounds strained. It simply takes control and lets the music flow.

Listening Experience

Boazu 2 doesn’t impress by force.

It convinces by immersion.

Music starts easily, builds naturally, and holds your attention without effort. Rhythm is locked in. Dynamics feel proportional. Loudspeakers behave as if they suddenly make more sense.

Listening sessions stretch longer. Albums finish. Distractions fade.
That is the real achievement of ZERO features.

Why We Selected Boazu 2 at Authentic High End

Boazu 2 aligns perfectly with how we build systems at Authentic High End.

It respects the source. It refuses unnecessary complexity. And it delivers musical involvement that grows rather than fades over time. In our Brussels listening rooms, it repeatedly proves that less circuitry, when guided by listening, leads to more music.

Technical Overview

• Product type: Integrated amplifier

• Inputs: 4× analogue RCA (summed, no switching)

• Volume control: Analogue, front panel & remote

• Features: ZERO (by design)

• Power stage: Tundra-derived, high-current design

• Cooling: 1.1 kg copper heatsink

• Power supply: Dual 100 W SMPS

• Design philosophy: Source First, listening-validated

• Build: Designed and assembled in Sweden

Who Is the Boazu 2 For?

The Lejonklou Boazu 2 is ideal for listeners who:

• Believe simplicity is a performance advantage

• Want maximum musical engagement, not flexibility

• Value source quality above all else

• Prefer listening over adjusting

• Live by the principle: if it sounds better, it is better

Discover more...