Orthos Evo Mono

Ayon Audio · Mono / Evo Mono

Orthos Evo Mono

The definitive statement in vacuum tube power and musical refinement.

The Orthos Evo Mono stands as the ultimate achievement in Ayon Audio's power amplification lineage, meticulously engineered to command the most demanding loudspeaker loads without sacrificing the soul of the performance. By harnessing the colossal output capability of twelve KT150 beam tetrodes per monoblock, this amplifier provides an effortless, near-limitless dynamic range that brings a lifelike sense of scale to every recording. At the core of the Orthos Evo is an uncompromising commitment to the zero-feedback philosophy. Despite its immense power, the circuit remains entirely purist, avoiding buffers, followers, and solid-state devices in the signal path. This meticulous approach ensures that the output is not just powerful, but exceptionally fast and harmonically transparent, retaining the vibrant texture and micro-dynamics that define a world-class listening experience. The sonic signature is one of breathtaking authority and natural fluidity. It provides a rock-solid, expansive soundstage that places instruments with pinpoint accuracy while maintaining a rich, saturated tonal palette. With its ability to switch between triode and pentode operation, the Orthos Evo offers the listener unparalleled versatility, allowing for a seamless transition between intimate, holographic realism and high-octane dynamic impact.

Key Features

01

Twelve KT150 output stage

Features a massive array of twelve precisely matched KT150 tubes per channel to provide high-current drive and immense dynamic headroom.

02

Switchable triode/pentode modes

Allows the listener to select between 300 watts of visceral Pentode power and 180 watts of refined, pure Class A Triode musicality.

03

Zero-feedback circuit

A completely feedback-free design ensures the signal path remains direct and uncoloured, preserving the natural harmonic structure.

04

Dual choke filtered power supply

Provides total isolation between amplification stages, ensuring a silent background for improved resolution and clarity.

05

Super-wide bandwidth transformers

Custom-engineered output transformers offer low insertion loss, maintaining speed in the highs and profound authority in the bass.

Design & Philosophy

Chapter 01

Design & Philosophy

The Orthos Evo Mono is built on the principle that the shortest signal path is the only path to high fidelity. By rejecting negative feedback and solid-state buffers, Ayon ensures that the amplifier remains entirely neutral. The design relies on high-current, low-impedance operation, allowing the power tubes to operate within their most linear range, which preserves the speed and harmonic integrity of the original source.
Build & Materials

Chapter 02

Build & Materials

Every monoblock is hand-assembled in a non-magnetic, resonance-optimised brushed anodised aluminium chassis that acts as a shield against external interference. Components are selected for their sonic transparency and long-term reliability, including high-speed coupling capacitors, beryllium-copper tube sockets, and silver-copper matrix wiring. This rigorous build quality ensures a reference-grade performance that remains consistent over years of use.
Sonic Signature

Chapter 03

Sonic Signature

Listeners can expect a boundless soundstage that holds its structure even at very high output levels. The performance is characterised by an ideal balance of weight and agility, featuring deep, muscular bass control combined with an open, liquid midrange. It is an extremely engaging amplifier that handles complex orchestral scores with ease, maintaining the atmosphere and emotional intimacy of a live performance.

Specifications

TypeTriode* or Pentode mode, Class-A*
Frequency response12 Hz – 60 kHz
Sensitivity1000mV
Impedance4 and 8 Ohms
Power handling250 Watt (Pentode) / 170 Watt (Triode)
Dimensions (H × W × D)25 × 56 × 61 cm
Weight52 kg per unit
Tube ComplementKT150 or KT170
Bandwidth8Hz-70kHz
Input Impedance at 1 kHz 47 KΩ
S/N ratio at full power98 dB
NFB0db
InputsRCA & XLR