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Dual Cirrus Logic
In the quest to get closer to the sound which the artist intended, Astell&Kern has developed the latest SR25 which is an upgrade to their previous model SR15. The latest SR25 features a Quad-core CPU along with the debutant Dual Cirrus Logic CS43198 Master Hi-Fi level DAC. It also extends native playback support for DSD256.
The SR25 debuts with the native DSD256 and 32bit/384kHz audio which has never been used in a standard Astell&Kern player before, allowing it to deliver unrivalled performance. It has a new performance mode that optimizes the performance depending on the data size of the source being played. This results in the production of ultra-high-resolution audio without any break-up.
The SR25 employs Astell&Kern's uniquely developed PCB design which helps in better processing the high-speed signals and delivering lag-free high-res sound without reducing the audion path lengths. To add more efficiency, the new circuit design and audio patterns implement distortion-free signal transmission and noise reduction to each channel. Furthermore, the laser ground extension tech delivers the best sound without any distortion. All thanks to the ultra-low noise filter that helps deliver a noise-free flawless sound.
The design of the SR25 is the result of Astell&Kern's Precise Metalworking Technology. The aluminum body is designed to deliver high-grade sound quality by suppressing noise. It features rectangular surfaces with added angles. The perfect cuts are similar to the reflections of light and it makes space depths around volume wheel which further highlights the reflections. It's built to be efficiently used with one hand. Additionally, the front screen angle adds more space around it to provide a better in-hand grip.
The SR25 delivers almost 21 hours of playtime which is two times the battery life of its predecessor. It supports aptX HD Bluetooth codec for 24-bit music playback along with the advanced LDAC codec for transferring high-resolution audio wirelessly. So pair the SR25 with Bluetooth headphones and speakers and be rest assured of the audio quality.
The firmware of the SR25 is based on the Android 9.0 OS, opening your door to music streaming applications. Astell&Kern further optimizes the OS for a fluid and efficient music listening experience. Stream your favourite songs over .apk apps like Tidal, Spotify, Amazon Music, Apple Music and more with the Open APP Service. The MQA (Master Quality Authenticated) allows you to play MQA audio files and while offering a sound that matched to the original master recording.
|BODY COLOR||Moon Silver|
|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|
|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)|
|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-pole supported)|
|WIFI||802.11 b/g/n (2.4GHz)|
|MQA PLAYBACK||Services(Tidal Masters), Local files, External USB, MQA-CD(ripped)|
|BLUETOOTH||V4.2 (A2DP, AVRCP, aptXTM HD, LDAC)|
|DIMENSIONS||2.5 ”(63.5 mm) [W] x 4.26 ”(108.3 mm) [H] x 0.63 ”(16.1 mm) [D]|
|WEIGHT||about 6.27 oz (about 178 g)|
|FEATURE ENHANCEMENT||Firmware upgrades supported (OTA)|
|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 SAMPTE||0.0004% 800Hz 10kHz(4:1) Unbalanced / 0.0003% 800Hz 10kHz(4:1) Balanced|
|OUTPUT IMEDANCE||Unbalanced Out 3.5mm (1.8ohm) / Balanced out 2.5mm (1.6ohm)|
|REFRENCE CLOCK JITTER||200 Femto Seconds|
|CAPACITY||3,150mAh 3.7V Li-Polymer Battery|
|CONTINUOUS PLAYBACK||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)|
|BUILT IN MEMORY||64GB [NAND]|
|EXTERNAL MEMORY||microSD (Max. 1TB) x1|
|SUPPORTED OS||Windows 7,8,10 (32/64bit), MAC OS X 10.7 and up|
|BOX CONTENTS||1. Astell&Kern - A&Norma SR25 Digital Audio Player|
|2.USB Type-C Cable X 1|
|3. MicroSD Card Slot Cover X 2|
|4. Protective Film (Front X 2, Back X 2)|
|5. Quick Start Guide X 1|
|6. Warranty Card X 1|
₹ 49,990/- ₹ 54,990 ||
₹ 79,990/- ₹ 89,990 ||
₹ 84,990/- ₹ 99,990 ||
₹ 99,990/- ₹ 119,990
|DAC Chip||Dual Cirrus Logic CS43198||Dual ES9028PRO||AK4497EQ||AKM AK4492ECB|
|Sample Rate||32bit/384kHz||32bit/384kHz||32Bit/384kHz||32bit / 384kHz|
|Battery Life||21 Hours||9 Hours||14 Hours||9 Hours|
|Balanced Outputs||2.5 mm||2.5 mm||4.4mm||2.5 mm|
|Digital Outputs||USB Type-C||SPDIF & USB-C||Coaxial, L2S & USB-C||USB-C|
|Balanced Outputs||64GB||64 GB||65 GB||128 GB|
|External Storage||1 x microSD||1 x microSD||1 x microSD||1 x microSD|
|Output level||Unbalanced 2.0Vrms
| Unbalacned 3.1Vrms
|Signal to Noise Ratio||
|Bluetooth Codecs||LDAC, aptX HD & SBC||LDAC & aptX||LDAC, AAC, SBC & aptX||aptX HD|
The SR25 is a new premium product that brings the philosophy of Astell&Kern to provide music the way it was meant to be heard, without compromise to an affordable, high quality player.
"This is a quality looking visual presentation right now with a stellar sound performance and a price that, in today’s market, that is very hard to find fault with. You are gonna like this a lot!"
"The A01 motherboard taps into Cayin’s house sound or preference for something slightly richer, sweeter and an all-round performance that will appeal to a very wide audience indeed."
"A sublime musical experience awaits the well-heeled audiophile. A near perfect marriage of industrial design and intoxicating sound make SA700 a superb high-res digital audio player by any measure."
SR25 MAC OS Driver
SR25 is compatible with MAC OS X 10.7 and up. In order for a Mac computer to communicate with our device a MTP program will need to be installed.
How to install the program for file transfer:
Don't sweat it, this Astell&Kern A&norma SR25 comes with a 1 year warranty from Astell&Kern that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.
Read more about Astell&Kern's warranty in India.
PRODUCT DESIGN WINNER
"Award winning SR15 now has successor. Astell&kKern's new cheapest player aims to upgrade the entry-level performance of its current line-up through a raft of improvements to both hardware and software."Read More
"The SR25’s design blends aesthetics with user convenience and features an aluminium body that suppresses noise and improves sound quality."Read More
"The SR25 is the first Astell&Kern player to offer LDAC with its v4.2 Bluetooth support, meaning that it can wirelessly stream 24-bit hi-res audio to compatible speakers and headphones"Read More
"The SR25 is a new premium product that brings the philosophy of Astell&Kern to provide music the way it was meant to be heard, without compromise to an affordable, high quality player."Read More
This is truly one of the best entry level to midfi DAP available right now. Let me divide the review into 3 sections:
Aesthetics: This device is truly beautiful with an impeccable construction, akin to buying an apple product😊 the tilted screen takes some time to get used to but eventually you begin to appreciate the design language and convenience while holding in hand. The screen resolution is superb, perhaps the size could have been bigger as close to an inch at the bottom is non-functional due to the touch panel home button. Due to the small screen size, some people with thick fingers may struggle a bit while typing. Alert: Strongly recommend to buy a suitable case as the beautiful exterior is highly prone to scratches!
Hardware: Simply amazing battery life...getting an easy 21 hours with continous play and can really go without charge for days together with moderate usage. This has been the holy grail for all DAPs, but AK this time has done an amazing job to put together super efficient internals along with providing an all capable device with wifi capabilities & bluetooth streaming. The interface is smooth and fluid and due to the tight control on OS implementation, there is hardly any bugginess common with full android based DAPs. The APK implementation for third party apps has been compartamentalized and done very well, where you are able to have offline access from common streaming platforms.
Sound: Typical AK sound, sonically warm with a wide soundstage and good resolution. This truly shines from the 2.5mm balanced output with absolutely black background with sensitive IEMs (currently using CA Solaris 2020). During my experimentation, I tried the 3.5 mm SE out with a portable amp (Corda Quickstep) and the sound scales up amazingly well with tight control on bass along with beautiful midrange and vocals.
I could recommend it just for the battery life! but this is really much more with absolutely brilliant implementation of the user interface (along with all streaming functionalities) with an excellent easy to love sound!
Astell&Kern - A&norma SR25