Tube Amplifier Lii Audio Amp01

Simple by design
No screen. No software. No unnecessary complexity.
Just a direct connection between your source, amplifier and speakers.

The Amp01 is a handcrafted Class A SET tube amplifier delivering 3.8W per channel, designed for full-range drivers, open baffle and horn systems.

Rather than chasing power, it focuses on coherence, tone and musical presence.

Is it right for your system?
Works best with:

High-efficiency speakers (93dB+)
Full-range drivers
Open baffle or horn speakers
Simple analog listening systems
Not recommended for:

Low sensitivity speakers
Very high listening levels
Large rooms requiring high power
If your system matches, the result is effortless and natural.
If not, this amplifier is not the right tool — and that is intentional.

Handcrafted construction
Each amplifier is built by hand using point-to-point wiring and a short signal path, with individually assembled and tested construction.

Key features
Single-ended Class A SET design
3.8W × 2 output
6P1 ×2 / 6N1 ×1 tube configuration
Custom EI transformer
Analog VU meter
Solid aluminum CNC knob

Selected components
Rubycon capacitors
WIMA capacitors
Nichicon filters
ALPS potentiometer
Carefully selected components ensure stability, durability and consistent sound performance.


On the 6P1 tube
The Amp01 uses the 6P1 tube, a design often overlooked outside of China, yet widely produced and refined over decades.

Rather than following more common tube choices, we selected the 6P1 for its natural tone, balance and musicality.

Its broad availability also supports long-term serviceability, with a stable supply for years to come.

In this amplifier, the 6P1 is not an alternative — it is a deliberate choice.


Why low power
With efficient speakers, less power reveals more: clarity, nuance and a more direct connection to the music.

The goal is not loudness, but presence.


Full specifications
Output Power: 3.8W × 2
Frequency Response: 20 Hz – 20 kHz
THD: <1%
Output: 4 / 8 Ohms
SNR: 88 dB
Power Consumption: 150W
Voltage: 220–240V
Dimensions: 237 × 270 × 115 mm
Weight: 5.7 kg

Designed as part of a system
The Amp01 is designed to work with high-efficiency full-range speakers such as the Lii Audio Crystal 6, and ideally within a complete system built around efficiency, simplicity and natural sound reproduction.

A coherent system always matters more than power alone.