- 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.

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.

General Specifications
Model:SR35
Body Color:Charcoal Gray
Body Material:Aluminum
Display:3.6-inch, 720 x 1,280 touchscreen
Supported Audio Formats:WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DIFF, DSF, MQA
Sample Rate:
PCM: 8kHz ~ 384kHz (8/16/24/32-bits per Sample)
DSD Native: DSD64 (1-bit, 2.8MHz), Stereo / DSD128 (1-bit, 5.6MHz), Stereo / DSD256 (1-bit, 11.2MHz), Stereo

Output Level
- [Normal] Unbalanced 2.1Vrms | Balanced 4Vrms (Condition No Load)
- [High] Unbalanced 3.1Vrms | Balanced 6Vrms (Condition No Load)

CPUQuad-Core
DAC:Cirrus Logic CS43198 x 4 (Quad-DAC)
Decoding:Support up to 32-Bit/384kHz Bit-to-Bit Playback
Input:USB Type-C Input (For Charging & PC & MAC)
Outputs:
- Unbalanced Out (3.5mm), Optical Out (3.5mm)
- Balanced Out (2.5mm, only 4-pole supported | 4.4mm, 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
*Audio specifications are based on Normal Gain
Storage Capacity
Built-In Memory:64GB [NAND]
External Memory:microSD x 1 (Max. 1TB)
Battery Capacity:3,150mAh 3.7V Li-Polymer
Charge Time:About 2.5 hours (5V 2A General Charging)
Playback Time:About 20 hours (Standard: FLAC, 16-bit, 44.1kHz, Normal Gain, Unbalanced, Vol. 50, LCD Off, Dual DAC Mode)
Supported OS:Windows 10, 11 (32/64bit); MAC OS X 10.7