Hi-Fi Sound on-the-go
The A&norma series was created to enjoy the premium sounds of Astell&Kern in a portable size with best in class specifications.
SR25 MKII, the previous model in the series, was loved by audio enthusiasts and those just starting their personal audio journey thanks to its portable size and powerful Hi-Fi sound through a 4.4-mm balanced jack.

The A&norma SR35 inherits these strengths while applying the amplifier and audio design that was applied to Astell&Kern's premium products to deliver the authentic sound quality that Astell&Kern are so well known for. The ultra compact SR35 features 20 hours of continuous playback, while supporting Quad DAC and two-step Gain control, and the A&norma line's first introduction of New Generation Amp technology with Astell&Kern's long-standing know-how for an even more delicate and clear Hi-Fi sound at higher output.

We have also applied our new UI/UX with improved visuals and usability to the SR35 for a more immersive music experience. In addition to this the SR35 is equipped with Roon Ready and MQA full decoder support to further enhance the performance of our A&norma line
 
Quad-DAC (Quad/Dual Switching Mode)
New Generation AMP Technology
2-Step Gain Mode
NEW UI/UX - Crimson Theme
Dual Wi-Fi (2.4 & 5 GHz)
20-hour continuous playtime
Supports two-way Bluetooth and LDAC, aptX™ HD
Roon Ready (First in A&norma series)
 
Quad DAC Mode for True Hi-Fi Sound
For the first time in the A&norma series, the SR35 deploys the CS43198 DAC from Cirrus Logic, in Quad DAC configuration. A very well-received DAC praised for its outstanding spatial sense and resolution.

In addition to this, a new design of audio circuit has been implemented, incorporating Astell&kern’s unique technologies along with the Quad DAC and our patented TERATON ALPHA technology for outstanding advancement in the dynamics, sense of space, resolution, and level of separation. Furthermore, our latest technologically advanced amplification circuitry, which was only available in our flagship products has now been incorporated to the SR35, boasting a dramatically improved and industry leading SNR of 130dB.

A Dual/Quad DAC Switching mode is offered enabling users to adjust and improve power management efficiency, further improving the long continuous playtime, a core feature of the A&norma series.

The SR35 supports Native DSD256 and PCM playback of up to 32 bit/384 kHz allowing you to enjoy true Hi-Fi sound without any restriction and free from distortion.
 
The Essence of Astell&Kern Technology
– Equipped with New generation AMP
Astell&Kern's brand philosophy - refusing to overlook even the smallest differences in sound quality - has been recognized by numerous media and audiophiles through our multiple releases of premium audio players that combine innovative circuits and amplifier technologies.

The SR35 is equipped with New generation AMP technology that was applied to the A&ultima line so that A&norma users can also enjoy the highest level of sound provided by the A&ultima line with this exclusive inhouse technology.

The new generation AMP technology applied to the SR35 is Astell&Kern's unique amplifier design that effectively improves noise reduction at high power output.
With this new technology, the SR35 contains the same amplifier design as the latest A&ultima and A&futura products, completely transforming into an amplifier design worthy of premium audio, from OPAMP selection to component placement and circuit design.

Moreover, in order to reliably operate different impedance output sources, the current handling capability at the output end is increased
to maximize the performance of various devices with one SR35
 
Specifications
 
General Specifications
Model 
SR35
Body Color 
Charcoal Gray
Body Material 
Aluminum
Display 
3.6inch HD 720 x 1280 touch screen
Supported Audio Formats 
WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF
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 
[Normal] Unbalanced 2.1Vrms │ Balanced 4Vrms (Condition No Load)
[High] Unbalanced 3.1Vrms │ Balanced 6Vrms (Condition No Load)
CPU 
Quad-core
DAC 
Ciruss Logic CS43198 x4 (Quad-DAC)
Decoding 
Support up to 32bit / 384kHz Bit to Bit playback
Input 
USB Type-C input (for charging & PC & MAC)
Outputs 
Unbalanced Out (3.5mm), Balanced Out (2.5mm, only 4-pole supported | 4.4m, only 5-pole supported)
Wi-Fi 
802.11 a/b/g/n/ac (2.4&5GHz)
Bluetooth 
V5.0 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC)
Dimensions 
2.51” (64mm)[W] x 4.26” (108.3mm)[H] x 0.63” (16.1mm)[D]
Weight 
about 6.49oz (184g)
Feature Enhancements 
Firmware upgrade supported (OTA)
Operating Temperature 
0℃ ~ + 40℃ (32℉~ 104℉)
 
Audio Specifications
Frequency Response 
±0.012dB (Condition : 20Hz~20kHz) Unbalanced │ ±0.011dB (Condition : 20Hz~20kHz) Balanced
±0.125dB (Condition : 20Hz~70kHz) Unbalanced │ ±0.126dB (Condition : 20Hz~70kHz) Balanced
S/N 
127dB @ 1kHz, Unbalanced │ 130dB @ 1kHz, Balanced
Crosstalk 
-133dB @ 1kHz, Unbalanced │ -145dB @ 1kHz, Balanced
THD+N 
0.0005% @ 1kHz, Unbalanced │ 0.0006% @ 1kHz, Balanced
IMD SMPTE 
0.0002% 800Hz 10kHz (4:1) Unbalanced │ 0.0002% 800Hz 10kHz (4:1) Balanced
Output Impedance 
Unbalanced Out 3.5mm (1.1ohm) │ Balanced Out 2.5mm, 4.4mm (2.7ohm)
 
Clock Source
Clock Jitter 
25pS (Typ)
Reference Clock Jitter 
70ps
 
Storage Capacity
Built-in Memory 
64GB [NAND]
External Memory 
Micro SD x1 (Max. 1TB)
 
Battery
Capacity 
3,150mAh 3.7V Li-Polymer
Charge Time 
about 2.5hours (5V 2A General Charging)
Playback Time 
about 20hours (Standard : FLAC, 16bit, 44.1kHz, Normal Gain, Unbalanced, Vol.50, LCD Off, Dual DAC Mode)
 
Supported OS
Supported OS 
Windows 10, 11(32/64bit) MAC OS X 10.7