ANALOGUE
BY NATURE
INTELLIGENT
BY DESIGN
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The idea
Timeless Vacuum Tube Technology. Reimagined in a Modern Form
ARENA was born from the idea of bringing classic vacuum tube technology into a modern, deliberately designed audio object — combining contemporary electronic solutions with everything that makes vacuum tubes so unique. Its form is no coincidence. The proportions of the stone enclosure follow the principles of the Golden Ratio, bringing together engineering precision and the natural harmony of form.
At the heart of ARENA is a Single-Ended topology built around the 845, 6SL7 and 6SN7 vacuum tubes. The 845 power triode delivers a distinctive sense of scale, effortless presentation and natural fluidity. The 6SL7 brings sensitivity and musicality to the voltage amplification stage, while the 6SN7 provides linearity, stability and precise signal control. Together, they create a signal path designed to preserve space, dynamics and natural tonal character.
ARENA brings together two worlds: the analogue purity and simplicity of a vacuum tube signal path, and the capabilities of modern technology, with microprocessor supervision and intuitive control. Technology remains in the background, so that only one thing takes centre stage — the music.
Single-Ended topology, 845 · 6SL7 · 6SN7
TRIODES, WITHOUT COMPROMISE
The choice of triodes was deliberate from the very beginning. Their inherent linearity, simplicity and natural harmonic behaviour allow the signal path to remain as direct and transparent as possible — preserving not only dynamics and tonal richness, but also the smallest details that give music its texture, space and presence.
The next engineering principle was the precise selection of each tube’s operating point and the topology surrounding it. The 845, 6SL7 and 6SN7 were not simply combined as individual gain stages — they were designed to operate as one coherent signal path, with each triode working in a carefully selected region where linearity, headroom and harmonic behaviour are optimally balanced.
Instead of relying on deep global negative feedback to correct the amplifier as a whole, ARENA uses carefully considered local feedback where it brings a genuine benefit. This approach preserves the intrinsic behaviour of the triodes and avoids forcing the entire amplifier into a single corrective loop.
The result is a circuit designed to retain the most subtle information contained in the signal: low-level dynamics, microdetail, harmonic decay, spatial cues and the delicate transitions between silence and sound. These are the elements that create the impression of air around instruments, reveal the acoustic character of a recording and make reproduced music feel natural rather than processed.
For ARENA, the triode is therefore not a nostalgic choice. It is an engineering choice — made in pursuit of simplicity, linearity and musical integrity.
Intelligent system control and display modes
INTELLIGENCE BEHIND, SOUND AHEAD
Microprocessor supervision supports the analogue signal path while remaining in the background. The circular display guides the user through startup, heating, activation, operation, standby and cooling, while the system continuously monitors critical voltages, currents and temperatures.
Each stage follows a precisely controlled sequence and timing to ensure safe and stable tube operation. In standby mode, heater parameters are adjusted to reduce tube stress and extend tube life. During shutdown, temperature is monitored throughout the cooling process.
The same functions and key operating parameters are available through the mobile application, providing convenient remote control and system monitoring.
If a tube failure or abnormal operating condition is detected, the amplifier automatically enters service mode, protecting the power supply and associated circuitry from secondary damage.
The result is an amplifier in which sophisticated control remains almost invisible during everyday listening. The microprocessor manages the sequence, timing, monitoring and protection. The tubes remain responsible for the sound.
Specifications