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Astell&Kern A&norma SR35 Digital Audio Player

Hi-fi sound on the go!

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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 of Astell&Kern's premium products, in order 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. The SR35 is also the first device in the A&norma line's to feature 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.

A&K have also applied a 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 the A&norma line.


Quad DAC Mode for TrueHi-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 patented TERATON ALPHA technology for outstanding advancement in the dynamics, sense of space, resolution, and level of separation. Furthermore, A&K's latest technologically advanced amplification circuitry, which was only available in their flagship products, has now been incorporated to the SR35, boasting a dramatically improved and industry leading SNR of 130dB.

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.

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.


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 SR35 supports a 2-step Gain Level mode to create the perfect match for a wide range of headphones and IEMs, maintaining optimal sound output.

The two-step gain setting with "Normal Gain" 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.


All-Day Music – Amazing Playtime

The compact size of the SR35 fits easily in your pocket and weighing in at only 184g is light enough to carry without any inconvenience.

With a maximum of 20-hour continuous playtime, you can enjoy music without a recharge all day long.

The SR35 is the perfect companion that you can use for long-haul flights as well as full days at work and vacations, guaranteeing you Hi-Fi sound anywhere, anytime.


Roon Ready and MQA Support for Hi-Fi Fans

Roon is a service for Hi-Fi fans who wish to play the best Hi-Fi sound without compromise on various devices through network systems.

Roon Ready, available on some premium audio products, now comes with the A&norma series for the first time, offering you a SR35-controlled network audio system to deliver the best sound quality.

Additionally, SR35 supports the full decoding of MQA 8X so that Hi-Fi MQA can be played natively.

  • 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)
  • SR35 Device
  • USB Type-C Cable
  • Quick Start Guide
  • Warranty Card
  • MicroSD card slot cover
  • Protective Film (Front x 2, Back x 2, Top x 2)
  • Suede Cloth
  • Postcard
GENERAL SPECIFICATIONS
Model SR35
Body Color Charcoal Grey
Body Material Aluminium
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 "Unbalanced 2.1Vrms
Balanced 4Vrms (Condition No Load)"
CPU Octa-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® aptXTMHD, 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: Over-The-Air)
AUDIO SPECIFICATIONS
Frequency Response ±0.012dB (Condition : 20Hz~20kHz) Unbalanced │ ±0.011dB (Condition : 20Hz~20kHz) 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 200 Femto Seconds
STORAGE CAPACITY
Built-in Memory 64GB [NAND]
External Memory microSD 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

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