The Future of Analog Sound

SE300

The Future of Analog Sound, SE300

A&futura from Astell&Kern is a product line that represents Astell&Kern’s ceaseless efforts for innovation. SE300, the fourth model in the A&futura range is a premium digital audio player that inherits this identity and expands the scope of sound with an entirely new implemented technology.

A&futura SE300 is equipped with an ultra-refined R-2R DAC, Class A/AB dual amps born with our proprietary TERATON ALPHA technology, and for the first time a self-developed FPGA optimized technology. With these unrivaled components, it offers the true sound philosophy and technology of Astell&Kern.

Immerse yourself into the true analog sound that the SE300 produces with Class-A AMP and R-2R DAC technologies, for the first time in an Astell&Kern player.

Fully Discrete 24 bit R-2R DAC
Equipped with 96 ultra-precision 0.01% & TCR10 resistors
New Dual AMP (Class A/AB) mode
Option for OS / NOS modes
Implemented self-developed and optimized FPGA technology
New Crimson theme UI/UX
Supports Bluetooth 5.0 and wireless Hi-Fi

Full Discrete R-2R DAC

Class-A Amp

Dual AMP (Class A/AB)

OS / NOS Mode

In-Housed Developed FPGA

TERATON ALPHA

bt-5-0-apt-x™-hd-ldac

SE300 Titan Limited Edition

Astell&Kern embraces the challenge of material innovation in pursuit of delivering the most exquisite products that not only convey original soundbut also harness the creativity of innovative design, right down to the finest details.Featuring special materials and precision craftsmanship, the SE300 Titan Limited Edition is a pioneer in material innovation, delivering both a premium feeland unparalleled sound from the R-2R DAC and analog amp.

Innovative Materials Inspired by Astell&Kern’s craftsmanship

Constructed using Grade 5 Titanium alloy, the SE300 Titan Limited Edition is designed to increase both the internal corrosive resistance and strength inherent in pure titanium. Titanium Grade 5, an alloy blend of aluminum and vanadium, embodies exceptional strength while retaining a light weight.
Recognized for its increased resistance to corrosion and absence of toxicity unlike aluminum, this alloy is the material of choice in aerospace, medical, and a wide range of other applications. Its ability to withstand heat and electrical conductivity also positions it as an optimal substance for reducing temperature variations and electrical interference within R-2R DACs and analog amplifiers.

Despite these numerous advantages, the material's intricate processing is attributed to its formidable strength and limited thermal conductivity.As a result, its integration into the product relies exclusively on the finesse of ultra-precision manufacturing methods. Astell&Kern approaches this by taking on the challenge: The front cover, initially shaped with precision, undergoes meticulous processing with dedicated polishing equipment, while the side sections, adorned with wave-like patterns, are meticulously crafted to achieve a consistent surface texture. This was perfected by a combination of 6-axis control robots and the skilled hands of engineers, resulting in a flawless surface.The wheel and side keys, undergo meticulous refinement through a Swiss-made 5-axis vibration-free CNC machine, a technique often employed in crafting premium wristwatches. The utilization of an AF coating further ensures the enduring allure and tactile experience of the Titan Edition.

Discover the SE300 Titan Limited Edition and embrace the cutting-edge analog sound experience from Astell&Kern right at your fingertips. The limited edition package for the SE300 Titan includes a leather case.

Fully Discrete 24bit R-2R DAC

To ensure the A&futura SE300 audio player better reproduces analog sounds, we set out to combine the DAC and AMP sections for the first time during the initial design phase.

The SE300 comes supplied with an R-2R DAC, instead of a Delta-Sigma DAC that is most commonly used in other audio players. R-2R DAC, also known as Ladder DAC, as it arranges resistors in a ladder form, offers natural yet dynamic Hi-Fi sounds, but it is extremely technical and difficult to execute as it requires complex refined resistor units and hard to manage current controls.
However, despite these technical challenges, after several years for development and a lot of trial and error we have managed to overcome this and create a new analog sound. In the process, we have meticulously selected each and every one of the 96 ultra-precision resistors and finalized our R-2R DAC technology.

SE300 takes us one step closer to realizing analog sound from a digital source and is the result of a long journey taken by Astell&Kern with uncompromising craftsmanship to find the ultimate sound solution.

Realization of 24-bit Decoding with R-2R DACThe R-2R DAC within the SE300 arranges 48 pairs (23xR and 25x2R) of 96 ultra-precision resistors to create analog signals, in turn realizing true Hi-Fi 24-bit decoding.

Ultra-precision resistor Design, the Key to Hi-Fi SoundIt is key to total the accurate current value with resistors that has the smallest error ranges in order to create Hi-Fi sound with an R-2R DAC. To realize this, Astell&Kern inspected each specifically selected ultra-precision resistor of 0.01% error range to complete the design of SE300.

Ultra-precision TCR10 SpecificationsTo create Hi-Fi sound without distortions within such an extreme precision design, we analyzed and preconceived any potential impacts that may be caused by changes in temperature. The SE300 comes with special *TCR10 specifications to minimize the changes in the 0.01% resistor error range.

* TCR10: 10 ppm/℃ Low Temperature Coefficient of resistor

Supporting Class A/AB Dual AMP Mode

The SE300 comes with a Dual AMP mode. Class A amplification that creates low distortions and natural sounds and a Class AB amplification that plays dynamic sounds with high efficiency so users can pick and choose from the two amps according to their listening preferences and genre of music that they are playing.

Experience the true sounds that only Astell&Kern can deliver with the SE300 that comes with an R-2R DAC and Class A/AB Dual AMPs born from Astell&Kern’s unique proprietary designs that reduces power consumption whilst enhancing output and removing noise.

Class A AMP mode

Class A AMP is an analog amp that offers the best linear output, amplifying signals without distortion or loss of signal and providing soft, warm, and natural sounds. The refined analog signal created directly by the R-2R DAC, reproduces a sound closest to the original analog audio through the organic and powerful Class A AMP.

Class AB AMP Mode

Class AB AMP is an analog amp that offers a powerful output with the added benefit of high efficiency.
This presents dynamic and crisp sounds with less harmonic distortion.

2-Step Gain Mode for the Perfect Hi-Fi Experience

For seamless use of sensitive IEMs and hard to drive headphones, a device must provide suitable output, respective of the connected device’s specification.

The SE300 supports a 2-step Gain Level mode to create the prefect match for a wide range of headphones and IEMs, maintaining an optimal sound output.
The two-step gain setting with "Normal" and "High Gain" modes can generate a high current output to create a powerful sound and excellent driver control.
With up to 6 Vrms from the balanced connections, driving high-impedance headphones has never been easier.

Normal Gain

High Gain

Output Level

Unbalanced 2Vrms

Unbalanced 3Vrms

Output Level

Balanced 4Vrms

Balanced 6Vrms

TERATON ALPHA, The Essence of A&K Audio Technologies

It would not have been possible to combine the exquisitely designed R-2R DAC with ultra-precision resistors and Class A AMP, which was considered impossible to miniaturize, without the innovative audio technology of TERATON ALPHA. SE300 is an innovative audio player that is applied with current and temperature control of TERATON ALPHA technology and an optimized FPGA design.

TERATON ALPHA, engineered through endless research, is Astell&Kern's unique technology that has been designed to produce audio playback that is as close to the original sound through effective power noise removal, efficient power management and unwavering amplification, and a fully converted audio output interface.
Circuit structures of R2R DAC and Dual A/AB AMP that are applied for the first time in the SE300 is completed with the sound solution of TERATON ALPHA, creating the purest form of sounds and music.

Supporting Optimized FPGA OS / NOS Modes

The SE300 comes with Astell&Kern’s exclusively developed FPGA and provides optimized OS / NOS modes.

The SE300 uses an FPGA (Field Programmable Gate Array) that we self developed for optimized design instead of using common off the shelf commercial semiconductor chipsets, relaying digital signals to the R-2R DAC through its algorithm. Astell&Kern’s FPGA, developed specifically for the SE300, supports the most ideal OS (Over Sampling) / NOS (Non-Over Sampling).

Enjoy the sound styles reproduced by NOS and OS modes, meticulously designed for the SE300's hardware and programs.

NOS (Non-Over Sampling) Mode

In NOS mode, the player reproduces the pure original sound without any digital processing, allowing users to enjoy the true unprocessedsounds decoded by the R-2R DAC itself.

OS (Over Sampling) Mode

OS mode offers partial digital processing that expands the bandwidth of the original signal to offer impressive details, with an expansivesense of space creating crisp and clear sounds.

OS Option

Maximum Conversion Rate

PCM

OS Mode

Supports up to 8x conversion 44.1kHz range PCM will be converted to 352.8kHz for playback 48kHz range PCM will be converted to 384kHz for playback

PCM

NOS Mode

BYPASS (ex. 44.1kHz => 44.1kHz)

DSD

OS/NOS Mode

Supports up to DSD 256 for playback

SE300 AUDIO BLOCK

New Experience, New User Interface

The SE300 comes with a redesigned Crimson-themed UI/UX transforming into a "true music player" for users to deeply connect with their music listening experience.

The new UI/UX is designed so that users can quickly browse music categories and re-discover songs within their music library.
We also added an easy album art search function so that users can re-discover the joy of viewing and interacting with music album art whilst listening to their music.

The crimson theme focuses on edge, simplicity, and dark mode keywords. The color theme of black with red highlights lowers visual fatigue and offers intuitive user experiences, and many other improvements were made to the device’s user-friendliness of app service, artist view, album sorting, and the album art search function.

Immerse yourself in music with the new UI/UX.

Real-Time Information Confirmed by Light

Behind the exquisite A&futura SE300 volume wheel is an LED light that is reminiscent of rising waves. With the LED light that radiates from the inside of the SE300, users can check the Bit Depth information of the currently playing music or the current AMP mode.

* The LED can be turned on or off according to the user’s preference.

Design

The design concept for the A&futura SE300 is 'Stream'.
Like small ripples on water turning into crashing waves, we designed the SE300 with Class A AMP, the ultimate AMP form, to have a unique identity.

The main body made from aluminum has streamlined surfaces that represent the flow of music. Through this, we create a firm yet flexible image. We added intensity by using contrasting materials such as stainless steel and glass to further enhance the theme of 'Stream'. In addition to this, the bottom section of the device curves outward, allowing for a more ergonomic grip whilst using the player.

The right side of the SE300 is coated with stainless steel to enhance visual focus. The polished side and triangular-patterned volume wheel are key to creating powerful and visually striking contrasts. The straight pattern on the rear of the volume wheel elevates the visual density and allows users to control volume and visually check the changes. The wheel lighting is placed behind the volume wheel to avoid direct exposure whilst allowing the light to be reflected on the side decorations and volume wheel knurl, creating the effect of light bursting from the inside.

The rear glass also features a new etching pattern, continuing the concept of 'Stream' The basic pattern features the A logo of Astell&Kern, designed to present an overall flow of stream with differences in size. This etching pattern amplifies the sense of flow with the differences in inclinations, adding a sense of depth to the rectangular rear glass that may otherwise look dull.

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