Astell&Kern A&norma SR15 DAP Music Player

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SR15 Digital Audio Player

The A&norma SR15 digital audio player is a new standard model from Astell&Kern with a competitive price. This entry-level item allows everyone to experience Astell&Kern sound.

Main Features

  • Upgraded Quad-core CPU
  • MasterHIFI® Class DAC x 2: Cirrus Logic CS43198
  • Natice DSD
  • [email protected] 480x800 Touchscreen
  • 64 GB Internal Storage Capacity
  • Aluminum Body

Hi-Fi Standards Redefined

A&norma sets the standard of Hi-Fi audio for novice listeners. The SR15, the first model of A&norma, is the beginning point of the Hi-Fi Audio experience that allows you to enjoy the philosophy and technologies of Astell&Kern, which is acclaimed by audiophiles around the world.

  • Dual DAC of CS43198, MasterHIFI™ tier chipsets from Cirrus Logic
  • Enhanced audio processing power and snappy UI with Quad-core CPU
  • Native DSD playback and playback-focused User Interface
  • Powerful audio performance curated by Astell&Kern's know-how

One Step Closer to the Original Performance

The A&norma SR15 uses two audio DAC chips for a Dual-DAC setup. These chips are known for their use in Home Hi-Fi systems which offer greater presence compared to the inferior DAC chips designed for mobile devices.

There are many devices that use DAC chips for audio processing, however, there are different tiers and quality of chips sought by Hi-Fi audio manufacturers to deliver an experience close to the original performance.

A&norma SR15 has adopted the MasterHIFI™ class DAC, CS43198 for the first time in a portable system. At Astell&Kern, we believe that true Hi-Fi should sound as close as possible to the original performance. The CS43198 is one of few DAC chipsets that is capable of bringing us even closer to the original when it's matched with the analog amp design of Astell&Kern. In result, it brings even more liveliness and warmth of sound without distortion.

Furthermore, A&norma SR15 supports native DSD bit-to-bit and gets one step closer to the Hi-Fi system.

Cirrus Logic and Hi-Fi Audio Evolution

Cirrus Logic has built its reputation as an expert in audio IC (Integrated Circuit) chips and solutions for more than three decades and has established its distinguished recognition in the audio industry.

Specializing in low power ICs for audio and voice signal processing applications, Cirrus Logic's products span the entire audio signal chain, from capture to playback, providing innovative products for the world's top smartphones, tablets, digital headsets, wearables and emerging smart home applications. Now they have introduced the MasterHIFI™ chipset solutions for excellent audio reproduction performance.

SR15 Dual DAC Output v. Other Products

Master HiFi Cirrus Logic

MasterHiFI™ class designation is only given to their chipsets that meet their highest audio performance standard. It will deliver your music as the musicians and producers wanted you to hear it.

An Evolving Legacy in High-Fidelity Audio

For more than three decades, Cirrus Logic has built its reputation as an expert in audio IC innovation. Cirrus Logic's audio innovation continues today with the development of MasterHIFI™ products from the industry's best audio IC design engineers. These integrated circuits, along with embedded software and DSP algorithms, are driving excellence in audio playback in new generations of mobile products.

Cirrus Logic audio products with the MasterHIFI designation meet the company's highest standard in high-fidelity audio playback. MasterHIFI™ products deliver the very best performance in sound clarity and pure, euphoric audio listening just like the artist intended. The devices should not unintentionally "color" the audio, but should maintain the “brightest” sounds expected from a recorded track.

Enhanced Audio Processing Power with Quad-core CPU

Some may think that only sound matters in Hi-Fi systems. While it does matter greatly, there are other factors that influence your immersive music experience as well. A&norma is designed to remove any distracting elements, including noise, distortion and unintuitive user interface.

The Quad-core CPU gives you even more processing power for your digital music and a lot faster, natural UI experience. Get lost in your music without distractions.

Quad-Core, Dual-Core, Single-Core Comparison

24-bit, 192 kHz Bit-to-Bit Playback

The A&norma SR15 plays any resolution of digital files up to 24-bit/192 kHz, bit-for-bit.
For 32-bit audio, downsampling is performed by the SRC (Sample Rate Converter) method.
DSD is native up to 64 MHz and DSD 128 MHz is converted to PCM for playback.

32bit SRC by the SR15 compared to DSD-to-PCM Conversion by the SR15

* 32-bit, 384 kHz is downsampled to 24-bit, 192 kHz, and 32-bit, 352 kHz is downsampled to 24-bit, 176 kHz for playback.
* DSD 128 is converted via DSD-to-PCM to PCM 24-bit, 176 kHz for playback.

USB Audio

A simple USB connection will allow the A&norma SR15 to be used as a digital music storage device and/or pre-amp to output digital audio through USB.
The A&norma SR15 transfers DSD in native format through DoP (DSD over PCM) and converts DSD to PCM for output for external USB Audio that do not support DoP.

* USB audio (Digital Out) output is available only when an external device can accept digital input through USB.
* DoP (DSD over PCM): This is the standard for transferring DSD data to a USB interface and sends DSD data by mounting them onto PCM data frames.
* The type of OTG cable to connect the SR15 with a portable amp differs depending on the specs of the amp. An OTG cable is not included in the SR15 package.

OTG Connector + Regular Cable Connect versus OTG Cable Connect

New Intuitive User Interface

A&norma SR15 has adopted the user interface of the A&ultima SP1000, which has grown famous for its intuitiveness and simplicity.

  • Player is in the main. All functions are centered on "music replay."
  • Secure access to the music DB and features to manage music files
  • Minimum menu depth and simple structure
A&Norma SR15 User Interface Image

Design Concept

A&norma SR15 was inspired by a composition of interconnected rectangles. The slight angle and precise, mindful alignment show the empty space and tones that fills the space. From any angle, or either hand you hold your device, it does not hinder the display screen and offers the best grip.

The rectangle on the front connects to the glass on the back plate. The rectangular reflection changes its shapes based on different angles of light creating 3-dimensional space.

Using Open APP Service

The Open APP Service enables the user to install specific APK music streaming apps to the device. Copy the desired APK into the Open Service folder of the product and install the relevant App in the Menu-Service of the product.

Using Open APP Service

AK Player Comparison

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Dark Gray
2.26" x 3.92" x 0.63"
5.43 oz
3.3" Touchscreen
WVGA 480x800
Quad-Core Dual DAC:
Cirrus Logic CS43198
Micro USB Input
3.5mm Unbalance
2.5mm Balance
Battery Life
11hr Playback
8hr charge (PC)
4.5hr (5V/2A)
64GB Internal
microSD ≤400GB
Windows 7, 8, 10 (32/64bit)
and MAC OS X 10.7+
Wi-Fi, Bluetooth v4.1
≤24bit / 192kHz
Native DSD64
Frequency Response
Condition: 20Hz-20kHz
±0.030dB Unbalance
±0.024dB Balance
Output Level
2.0 Vrms Unbalance
4.0 Vrms Balance
1.1 Ohm (3.5mm)
1.6 Ohm (2.5mm)
Moon Silver
2.5" x 4.26" x 0.63"
6.27 oz
3.6" Touchscreen
HD 720x1280
Quad-Core Dual DAC:
Cirrus Logic CS43198
USB Type-C Input
3.5mm Unbalance
2.5mm Bal. 4-pole
Battery Life
21hr Playback
2.5hr charge (5V/2A)
64GB Internal
microSD ≤1TB
Windows 7, 8, 10 (32/64bit)
MAC OS X 10.7+
Wi-Fi, Bluetooth v4.2
≤32bit / 384kHz
Native DSD256
Frequency Response
Condition: 20Hz-20kHz
±0.014dB Unbalance
±0.011dB Balance
Condition: 20Hz-70kHz
±0.10dB Unbalance
±0.12dB Balance
Output Level
2.0 Vrms Unbalance
4.0 Vrms Balance
1.8 Ohm (3.5mm)
1.6 Ohm (2.5mm)
Select a DAP to view and compare specifications
Select a DAP to view and compare specifications


2019 iF Design Award
2019 Sound + Image Awards
Inner Fidelity 2018 Editor's Choice Award
What HiFi? Award 2018
2019 Red Dot Design Award

Press and Reviews

Astell n Kern Magazine Guide
Astell&Kern Magazine

Guides & Reviews
by Moon Audio

Inner Fidelity Review
Inner Fidelity

by Rafe Arnott
Dec. 2019


Technical Features

Body Color
Dark Gray
Body Material
3.3inch WVGA (480 x 800) TFT LCD
Supported Audio Formats
Sample rate
PCM : 8kHz ~ 192kHz (8/16/24bits per Sample)
DSD Native : DSD64(1bit 2.8MHz), Stereo
DSD to PCM : DSD128(1bit 5.6MHz)
Output Level
Unbalance 2.0Vrms / Balance 4.0Vrms (Condition No Load)
Cirrus Logic CS43198 x2 (Dual DAC)
Support up to 24bit / 192kHz Bit to Bit Decoding
USB Micro-B input (for charging & data transfer (PC & MAC))
Connection Mode : MTP (Media Device)
PHONES (3.5mm) / Balanced Out (2.5mm, only 4-pole supported)
802.11 b/g/n (2.4GHz)
V4.1 (A2DP, AVRCP, aptXtm HD)
2.26 ”(57.5 mm) [W] x 3.92 ”(99.7 mm) [H] x 0.63 ”(16.1 mm) [D]
about 5.43 oz (about 154 g)
Feature Enhancements
Firmware upgrades supported (OTA)

Audio Performance

Frequency Response
±0.030dB (Condition: 20Hz~20kHz) Unbalance / ±0.024dB (Condition: 20Hz~20kHz) Balance
±0.038dB (Condition: 10Hz~70kHz) Unbalance / ±0.065dB (Condition: 10Hz~70kHz) Balance
Signal to Noise Ratio
122dB @ 1kHz, Unbalance & Balance
137dB @ 1kHz, Unbalance & Balance
0.0008% @ 1kHz, Unbalance / 0.0009% @ 1kHz, Balance
0.0004% 800Hz 10kHz(4:1) Unbalance & Balance
Output Impedance
Balanced out 2.5mm (1.6ohm) / PHONES 3.5mm (1.1ohm)

Clock source

Clock Jitter
45ps (Typ)


3,150mAh 3.7V Li-Polymer Battery


Built-in Memory
External Memory
microSD (Max 400GB) x1


Supported OS
Windows 7,8,10 (32/64bit)
MAC OS X 10.7 and up

Package Includes

  • DAP
  • USB-B Micro 5-pin Charging Cable
  • Micro SD Card Slot Cover
  • Protective Film
  • Quick Start Guide
  • Warranty Card
  • one year limited warranty*

*The warranty period for all the products is one year from the date of purchase. However, every other item except the main body will be classified as accessories, and in this case, the warranty period may be different. Just like replaceable batteries, 1-year warranty from the date of purchase is applied to embedded batteries.