Titanium variant is available to pre-order with an ETA of approx. early June.

Copper variant is available to pre-order with an ETA of approx. late June.

Triple Analog Audio Architecture Freely Switchable to Suit Every Musical Style - Two Hybrid Tube/Transistor Modes + One Fully Discrete Transistor Circuit

Hybrid Mode Tube Preamp + Solid-State Output Stage
Built around a pair of KORG Nutube 6P1 tubes, the circuit combines a buffer stage, a tube voltage-gain stage, and a buffer driver stage to deliver refined, expressive performance. An independent JFET constant-current source circuit in the source load enhances drive capability and control, bringing together tube warmth and solid-state precision. With two selectable sound signatures Velvet and Lumina tailor the presentation to suit their preference. listeners can tailor the presentation to suit their preference.

Velvet - Musical Warmth
Warm, harmonically rich sound with pronounced even-order harmonics, ideal for vocals and relaxed, expressive listening.

Lumina - Sonic Clarity
A clear, transparent presentation with strong definition and evenly balanced harmonics, well suited to a wide range of musical styles.

Fully Transistor Mode
In FULLY TR mode, the signal path is driven entirely by a fully discrete transistor amplification circuit, bypassing the Nutube stage to deliver exceptional clarity, speed, and control. Ideal for large-scale works such as classical symphonies and cinematic soundtracks.

Triple Power Output Mode: P, P+ and Turbo Precision Power Matching for Every Headphone
Evo One offers three selectable power output modes-P, P+, and Turbo-for precise matching with a wide range of headphone loads. Delivering up to 1300mW @ 32 Ohms, it effortlessly drives everything from sensitive IEMs to demanding full-size headphones.
Selecting Turbo Mode switches the amplifier into Class A operation, increasing operating current and voltage swing for greater drive capability. This ensures stable, authoritative control over low-sensitivity and high-impedance headphones.

Fully Balanced, Fully Differential, Fully Discrete Headphone Amplifier Circuit
Evo One employs a fully discrete transistor and audio-grade MOSFET architecture, engineered for high-performance headphone amplification. Its fully balanced differential design is built around three core stages: balanced input, voltage amplification, and power output.

A precision feedback network allows users to select between NFB (Negative Feedback) and Non-NFB modes, along with switchable Class A and Class AB operation.

With multiple configurable operating parameters, Evo One lets listeners fine-tune the amplifier's behavior and sonic character for a listening experience tailored to personal preference.

Dual Feedback Circuit Architecture
Selectable local negative feedback (NFB) or zero-feedback (Non-NFB) modes to suit different musical styles and listening preferences.

NFB Mode
NFB mode uses auxiliary negative feedback to reduce loop delay and phase shift, resulting in a more dynamic and controlled presentation with fuller mids and deeper emotional expression.

Non-NFB Mode
The Non-NFB circuit delivers a more transparent, natural sound. The presentation is open and spacious, offering a wider soundstage and a more relaxed listening experience.

Dual Operation Modes
Supports both Class A and Class AB amplifier operation modes, balancing sound quality and power efficiency.

Class A
Delivers smoother signal reproduction, refined tonal texture, and a more natural musical presentation.

Class AB
Higher efficiency with stronger dynamics while maintaining excellent sound quality.

Shared Line Out / Pre-Out with Selectable Hybrid & Fully TR Architectures
Evo One features a shared Line Out (LO) and Pre-Out (PRE) design, providing flexible connectivity while preserving signal integrity. Both outputs support selectable Hybrid and Fully TR amplifier architectures, allowing users to tailor the sound character to their personal listening preferences.

This versatile design enables seamless integration with active speakers, external power amplifiers, or in-vehicle audio systems, making it easy to build a personalized audio chain. Whether in a desktop setup or a mobile environment, Evo One consistently delivers high-fidelity sound.

Battery Bypass Mode Extended Battery Protection for Long-Term Use
Evo One incorporates a dedicated battery bypass function designed to extend battery life during prolonged use.

When connected to an external DC power source, such as a PD charger, and the system detects an input voltage above 9 V, users can switch the device to DC Mode through the system interface.

Once activated, the battery enters bypass mode, temporarily suspending charge and discharge cycles and allowing the device to run directly from the external power source instead of the battery. This enables continuous operation while reducing unnecessary battery wear from repeated charging and discharging.

The design improves long-term battery protection while enhancing the overall stability, durability, and practicality of Evo One for everyday listening.

Parallel Differential DAC Core Flagship Multi-DAC Decoding Architecture
Evo One adopts a parallel differential DAC architecture built around two AK4191EQ digital processors and four AK4499EXEQ DAC chips.

Each AK4499EXEQ operates in dedicated MONO mode, forming a fully balanced decoding structure. DAC outputs are transmitted in current mode to the I/V conversion stage, enabling 8-channel I/V conversion processing.

This architecture significantly improves resolution, dynamic range, and channel separation, providing highly accurate decoding for high-resolution audio playback.

LPF Audiophile-Grade Low-Pass Filtering Circuit
Evo One uses two ADI audiophile-grade AD8620ARZ op-amps to create a four-channel low-pass filtering (LPF) circuit.

With outstanding low-noise performance, the design ensures a clean, transparent signal path and a quiet background while preserving subtle detail and delicate musical texture. It also effectively suppresses noise and interference during signal transmission.

Ultra-Low Noise - Fully Balanced Volume Control System
Evo One uses two flagship JRC MUSES72320 volume control chips to create a fully balanced four-channel hardware volume and gain control system.

Compared with traditional digital volume adjustment, this design effectively avoids noise accumulation and signal distortion, ensuring consistent tonal performance across the entire volume range.

Its ultra-low-noise architecture makes Evo One especially well suited to high-sensitivity headphones and demanding audiophile listening applications.

Meticulously Engineered Multi-Stage Independent Power Supply System - The Foundation of a True Hi-End Listening Experience
Evo One adopts a custom-designed, end-to-end precision power supply architecture, carefully engineered to support the entire audio signal chain.

From power delivery and multi-stage voltage regulation to filtering and noise suppression, every stage is comprehensively optimized to ensure power purity and fast transient response.

This refined power architecture provides the foundation for powerful dynamics, an expansive soundstage, high resolution, and finely detailed musical reproduction.

Supercapacitor Power System - Solid Foundation for Dynamic Performance
The main power supply of Evo One adopts an ELDC flagship supercapacitor (Electric Double-Layer Capacitor), commonly referred to as a large audio "power reservoir."

With its ultra-low ESR and rapid charge/discharge capability, it works together with a 10,000mAh 3.87V matched battery pack (two cells in parallel) to form a powerful energy core for the device.

This architecture provides stable and instantaneous power delivery, offering strong support for dynamic performance and full-spectrum audio reproduction.

FPGA & Clock Power Supply
The FPGA is powered by three low-noise LDO regulators from Texas Instruments, providing dedicated 3.3V, 1.8V, and 1.2V power rails.

The femtosecond clock is supplied by its own independent low-noise LDO-regulated power source, ensuring clean and stable operation.

DAC Circuit Power Supply
The DAC power system is built around the ADI LT8334 power management chip, offering wide input voltage support, high power efficiency, and comprehensive protection.

The left and right channels are powered independently, effectively reducing inter-channel interference and noise coupling while improving channel separation.

Each channel is further supported by multiple low-noise LDO regulators, with the DAC core powered by the ADI LT3045 ultra-low-noise LDO to deliver high-precision, ultra-clean power for accurate decoding performance.

In addition, the DAC differential analog output stage is equipped with 16 low-ESR polymer capacitors, further enhancing power stability and instantaneous dynamic response.

Power Amplifier Power Supply Symmetrical Power Delivery + Full-Bandwidth Filtering for Uncompressed Dynamics
The amplifier stage uses dual ADI LT8334 power management circuits, providing symmetrical positive and negative power rails precisely matched to the amplifier's operating requirements.

The filtering network combines a Panasonic low-ESR solid-state main capacitor with 12 Panasonic ultra-low-ESR polymer capacitors, forming an efficient multi-stage filtering system. The solid-state capacitor suppresses low-frequency ripple and noise, while the polymer capacitor array acts as a high-frequency compensation network, creating a full-bandwidth, multi-dimensional power filtering architecture.

This design enables the amplifier to meet the instantaneous high-current demands of dynamic musical passages, preventing voltage sag that could otherwise lead to dynamic compression or distortion.

At the same time, it improves power transient response, delivering tighter bass, more delicate highs, and a cleaner background free from current noise or harshness, ensuring high-fidelity reproduction across the full frequency range.

Dual-Material Craftsmanship Refined Design Built for Portable Listening
Evo One features a meticulously engineered chassis available in titanium or copper. Precision CNC machining gives the body a solid, refined feel, while multiple surface-finishing techniques create a layered and sophisticated aesthetic.

The clean, streamlined exterior is complemented by an ergonomic form that fits naturally in the hand, balancing visual elegance with everyday usability. Its lightweight construction makes the device easy to carry, while the combination of premium materials and thoughtful structural design also supports efficient heat dissipation and a comfortable grip.

Every detail is designed with portable listening in mind, bringing together materials, design, ergonomics, and practicality to create a product that feels both professional and intuitive to use.

Portable Chassis Optimized Cooling with Enhanced Grip
The portable chassis features side ventilation grilles designed to conform naturally to the hand, providing a secure and comfortable grip.

At the same time, this structure increases the effective heat dissipation area by 27%, significantly improving thermal efficiency and ensuring stable performance during high-power playback.

Volume Knob - Gold-Plated Brass PVD Knob
Crafted from brass with a gold PVD finish, it delivers a premium tactile feel and excellent durability.

3D Curved Texture with Copper Finish
A precision-machined 3D curved texture combined with a copper finish enhances both visual elegance and grip during operation.

Triple-Chamber Internal Architecture - Hardware-Level Isolation for a Pure, Noise-Free Background
Evo One features a precision-engineered triple-chamber internal layout, separating the battery, vacuum tube stage, and main circuitry into independent sections. This design isolates potential sources of interference at the hardware level, preserving signal purity and delivering a clean, noise-free sonic background.

Full Silicone Encapsulation Vibration-Damping Structure
The vacuum tube stage is enclosed within a full-silicone encapsulation structure that effectively suppresses microphonic effects caused by external vibrations.
This design improves mechanical stability, allowing the tube stage to operate more consistently and ensuring cleaner, more refined sound reproduction.

Three-Dimensional Thermal Management System
An aluminum-alloy structural framework forms the core of the cooling system, working together with graphite thermal sheets, thermally conductive adhesive, and nickel-plated copper components to create a highly efficient heat-dissipation module.

This three-dimensional thermal architecture rapidly distributes heat and maintains balanced system temperatures, significantly improving cooling efficiency. The result is stable long-term operation and sustained peak performance, even under demanding playback conditions.

Flagship-Level Engineering Driven by High-Performance Hardware - High-Resolution Display Intuitive Touch Interaction
Evo One features a 6-inch BOE In-Cell 18:9 Full HD+ display (1080 x 2160) protected by Corning® Gorilla® Glass 5.

The display supports multi-touch and gesture controls, delivering smooth and responsive operation for effortless navigation.

Long Battery Life - Fast Charging Efficient Power Management
Evo One features a 10,000 mAh 3.87 V high-capacity battery and supports 45 W PD 3.0 fast charging, delivering extended playback time with optimized power efficiency.

Comprehensive Connectivity, HiByCast Remote Control
Evo One supports Bluetooth 5.3, HiByCast Remote Control, and Wi-Fi 7 connectivity. It is compatible with UAT (up to 192 kHz), LDAC (up to 96 kHz), SBC, and AAC codecs. With the HiByCast app, you can easily manage music files, browse and search your music library, and control playback and volume from a smartphone or tablet.

Digital Audio Connectivity Bidirectional Transmission
Evo One features multiple digital audio outputs, including USB Audio, S/PDIF, and I'S.
Bidirectional USB Audio is also supported, with USB Audio output handling PCM up to 768 kHz and DSD512.

Intelligent Indicator Sampling Rate Visualization
The volume knob integrates a multi-color LED indicator that displays the current audio sampling rate in real time during playback, providing an intuitive and professional visual reference.

Flagship Performance Uncompromisingly Smooth
Powered by the Qualcomm QCS8550 platform, with performance comparable to Snapdragon 8 Gen 2, Evo One comes equipped with 16 GB of RAM and 512 GB of storage, with support for microSD card expansion up to 2 TB. The generous storage capacity easily accommodates extensive lossless music libraries, while the flagship chipset delivers an exceptionally smooth and responsive user experience.

Maxed-Out Core Performance Lag-Free Listening Experience
Powered by an all-big-core CPU architecture, Evo One delivers outstanding performance for portable listening. From complex audio decoding and advanced multitasking to professional-grade audio adjustments, every task is handled smoothly and effortlessly. The result is a fluid, lag-free experience that meets the needs of serious listeners and brings greater ease, stability, and enjoyment to portable playback.

16 GB RAM + 512 GB Storage Expandable up to 2 TB
Designed for demanding listeners, EVO One comes equipped with 16 GB of RAM and 512 GB of internal storage, providing generous capacity for large high-resolution music libraries. With microSD card expansion up to 2 TB, it gives audiophiles the flexibility to store and carry extensive lossless collections with ease.

High-Speed Storage
Delivers fast read/write performance for smooth operation and quick access to high-resolution audio files.

Two Editions Individually Engineered Dedicated Independent PCB Layout -

Evo One (Ti)
The Evo One Titanium (Ti) features a chassis machined from aerospace-grade TC4 titanium alloy, delivering an ideal balance of strength, lightweight construction, and long-term durability.

A refined PVD surface treatment provides a smooth tactile feel and a distinctive silver-white metallic finish.

Internally, the Titanium edition employs a first-level HDI PCB architecture with blind-via grounding for ower-supply filtering, minimizing power-loop length and parasitic impedance. Large, continuous ground planes span multiple PCB layers, while digital and analog audio signals are routed on dedicated inner layers to maximize shielding and suppress interference between digital and analog circuitry.

Evo One (Cu)
The Evo One Copper (Cu) takes a fundamentally different approach.

Its high-conductivity copper chassis serves as both a rigid structural enclosure and a grounded electromagnetic shield, delivering exceptional noise suppression and an ultra-low-impedance reference.

PCB routing is carefully optimized so that digital audio, high-speed data, and clock signals follow the shortest possible return paths to ground. Noise currents are tightly controlled through closed-loop returns via the chassis and dedicated ground planes, ensuring precise isolation between digital and analog circuitry.

EvoAria

EvoAria Evo One Digital Audio Player