Key Features
- Compact, award-winning DAP
- Quad-core processor enables efficient operations and smooth playback
- Dual CS43198 DAC setup offers 32bit/384kHz audio with support for MQA
- Android 9.0 OS allows for compatibility with major streaming platforms
- Offers up to 21 hours of battery life
Astell & Kern A&norma SR25 Hi-Res Audio Player, Silver Overview
The Astell & Kern A&norma SR25 is a What Hi-Fi award-winning Hi-Res audio player, capable of delivering a high-quality sound while on your travels. This portable device combines a quad-core processor with dual Cirrus Logic CS43198 DACs, delivering immersive audio with native support for DSD256 and 32bit/384kHz formats. Its MQA compatibility will perfectly replicate the quality of a song's original recording. Featuring both balanced and unbalanced outputs, as well as Bluetooth connectivity, the SR25 allows you to connect to a wide range of headphones, both wired and wireless. With a 21-hour battery life, compact design, and stylish appearance, the SR25 is the perfect companion for any headphone listener.
Product Ref: 209175
Full Description
2021 Best Portable Music Player £500-£1000
"The Astell & Kern A&norma SR25 is the latest in what has been a long line of excellent, What Hi-Fi? Award-winning, ‘entry-level’ portable music players. Each new generation invariably proving more talented than the last. The SR25 doesn’t let us down, propelling its lineage forward from the 2018-introduced A&norma SR15 to set a new performance benchmark."
The Ear - Best Buy
"...this DAP will drive just about any headphone from super-sensitive IEMs to big over-ears, and render a soundstage large enough to compete with serious desktop amps."
Stunning Upgrade
It’s not easy improving upon a class-leader, but that’s just what Astell & Kern have done with the A&norma SR25, which improves on the SR15 thanks to Quad-Core CPU paired with the Dual Cirrus Logic CS43198 Master Hi-Fi level DAC. The addition of Bluetooth LDAC also improves the quality of wireless sound through compatible headphones.
Hi-Res Audio
The SR25 supports native DSD256 and 32bit/384kHz audio for the first time in an Astell&Kern standard product. The SR25, which is smaller than other players, has been developed to achieve stable, ultra-high-resolution sound. The Performance Mode automatically optimises and sets the memory mode in the system according to the data size of the source being played. The SR25 also supports MQA audio, allowing this DAP to reproduce audio files as they were intended to be heard, making it a portable powerhouse that brings you closer to the original performance.
PSB Design
With the SR25, the Astell&Kern team developed a completely different PCB design from the existing SR15 to process the high-speed signals where required, resulting in audio path lengths that are the same, allowing for super-high resolution sound without any delay. Furthermore, newly designed audio patterns and power circuits for distortion-free signal transmission and noise rejection are applied to each channel. The result is an Ultra Low Noise Filter that allows you to experience Astell&Kern's flawless sound, with Zero Noise, on the SR25. Moreover, this DAP is equipped with 2.5mm balanced and 3.5mm unbalanced headphone outputs, so you can easily connect to various types of wired headphones.
Long Battery Life
In the SR25, the team not only applied highly efficient components, but they focused on developing circuit optimisations to get the most out of their performance. The result is up to 21 hours of continuous playtime, more than double the previous generation SR15, with no compromise in sound quality.
Wireless Listening
In addition to 24-bit music playback via aptX HD Bluetooth as in previous Astell&Kern players, the SR25 adds LDAC support to give users more options to listen to high resolution audio wirelessly. Now you can enjoy Astell&Kern's high-quality sound when paired to Bluetooth earphones, headphones and speakers.
Excellent User Interface
Android 9.0 ensures the most popular music streaming apps installed via Open APP will be fully compatible with your Astell&Kern player now and with future app updates. Astell&Kern customises Android to provide a fully optimised system and user interface, designed to give you smooth musical playback.
Features
- Upgraded Quad-Core processor enhances audio processing
- Features a Dual Cirrus Logic CS43198 DAC configuration, capable of 32-bit/384kHz audio performance
- New PCB design delivers synchronised, high-speed signal transmission
- Ultra Low Noise Filter offers great distortion reduction
- Runs on a customised Android 9.0 OS for smooth, responsive functionality
- Offers both 2.5mm balanced and 3.5mm unbalanced outputs to broaden the connectivity options
- Bluetooth technology supports LDAC and aptX HD codecs, producing high-quality wireless audio
- MQA compatibility lets you enjoy a studio-like sound
- Optimised Performance Mode provides a stable, ultra-high-resolution sound
- Up to 21 hours of continuous playtime on a single charge
What's in the Box?
- Astell & Kern A&norma SR25 Hi-Res Audio Player
- 1 x USB-C to USB-A cable (1 metre)
- 3 x screen protectors
- 1 x Quick Start guide
Specifications
General
| Model | SR25 |
|---|---|
| Body Colour | Moon Silver |
| Body Material | Aluminum |
| Display | 3.6inch WVGA (720 x 1,280) TFT LCD |
| Supported Audio Formats | WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA |
| MQA playback | Services(Tidal Masters), Local files, External USB, MQA-CD(ripped) |
| Sample rate | PCM : 8kHz 384kHz (8/16/24/32bits per Sample) / DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo / DSD256(1bit 11.2MHz), Stereo |
| Output Level | Unbalanced 2.0Vrms / Balanced 4.0Vrms (Condition No Load) |
| DAC | Cirrus Logic CS43198 x2 (Dual DAC) |
| CPU | Quad-Core |
| Decoding | Support up to 32bit / 384kHz Bit-to-Bit Playback |
| Input | USB Type-C input (for PC & MAC) |
| Outputs | Unbalanced Out (3.5mm) / Balanced Out (2.5mm, only 4-polesupported) |
| Wi-Fi | 802.11 b/g/n (2.4GHz) |
| Bluetooth | V4.2 (A2DP, AVRCP, aptXTM HD, LDAC) |
| Dimensions (HxWxD) | 108.3mm x 63.5mm x 16.1mm |
| Weight | approx. 178g |
| Feature Enhancements | Firmware upgrades supported (OTA) |
| Product Code | AK1025 |
Audio Performance
| Frequency Response | ±0.014dB (Condition: 20Hz 20kHz) Unbalanced / ±0.011dB(Condition: 20Hz 20kHz) Balanced±0.10dB (Condition: 20Hz 70kHz) Unbalanced / ±0.12dB(Condition: 20Hz 70kHz) Balanced |
|---|---|
| Signal to Noise Ratio | 122dB @ 1kHz, Unbalanced / 123dB @ 1kHz, Balanced |
| Crosstalk | -138dB @ 1kHz, Unbalanced / -144dB @ 1kHz, Balanced |
| THD+N | 0.0007 @ 1kHz, Unbalanced / 0.0008 @ 1kHz, Balanced |
| IMD SMPTE | 0.0004 800Hz 10kHz(4:1) Unbalanced / 0.0003 800Hz 10kHz(4:1)Balanced |
| Output Impedance | Unbalanced Out 3.5mm (1.8ohm) / Balanced out 2.5mm (1.6ohm) |
Clock Source
| Clock Jitter | 25ps(Typ) |
|---|---|
| Reference Clock Jitter | 200 Femto Seconds |
Battery
| Capacity | 3,150mAh 3.7V Li-Polymer Battery |
|---|---|
| Continuous Playback Time | About 21 hours (Standard - MUSIC: FLAC, 16-bit/44.1kHz, Unbalance,Volume 50, EQ OFF, LCD OFF) |
| Charge Time | About 2.5 hours (Standard - 5V/2A Charging) |
Memory
| Built-in Memory | 64GB [NAND] |
|---|---|
| External Memory | microSD (Max. 1TB) x1 |
OS
| Supported OS | Windows 7,8,10 (32/64bit), MAC OS X 10.7 and up |
|---|
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