Enjoy the Premium Sounds of Astell&Kern On-the-Go with the SR35 Digital Audio Player

Features Cirrus Logic CS43198 Quad-DAC (Quad/Dual switching mode)
New UI with "Crimson" theme
New Generation AMP technology with 2-Step Gain mode
Dual WiFi (2.4 & 5GHz)
20-hour continuous playback
Supports 2-way Bluetooth and LDAC, aptX™ HD, 1st Roon Ready A&norma DAP

Astell&Kern SR35 with earphones on glass table with plant

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-specs. SR25 MKII, the previous model in the series, was loved by both enthusiasts and novices. The SR35 brings new tech and A&K's long-standing know-how for a more delicate and clear Hi-Fi sound with all the bells and whistles.

Quad DAC Mode for True Hi-FI Sound

For the first time in the A&norma series, the SR35 deploys the CS43198 DAC for Cirrus Logic, in Quad DAC configuration. In addition, a new audio circuit design has been implemented, incorporating Astell&Kern's unique technical collaboration between the Quad DAC and patented TERATON ALPHA tech for outstanding advancement in dynamics, space, resolution, and separation. A Dual/Quad DAC Switching mode is also offered enabling users to adjust and improve power management efficiency.

Closeup of Teraton circuit board

New Generation Amp

The SR35 is equipped with New Generation AMP technology previously exclusive to the A&ultima line, a unique design that improves noise reduction at high power output. The SR35 now contains the same amplifier design as the latest A&ultimate and A&futura products. Moreover, in order to reliably operate at varying output source impedances, the output current handling capability is increased to maximize the performance of varying devices.

2-Step Gain Mode

The SR35 supports a 2-step Gain Level mode to create the perfect match for a wide range of headphones and IEMs for seamless use of both sensitive and hard-to-drive devices. Both 'Normal Gain' and 'High Gain' modes can generate a high current output to create a powerful sound and excellent driver control. With up to 6Vrms from the balanced connections, driving high-impedance headphones has never been easier.

Astell&Kern SR35 with Focal headphones and ceramic decor

All-Day Music

In step with Astell&Kern's core value of the A&norma series, the SR35 provides unlimited Hi-Fi audio anywhere at any time with premium-class specifications, offering the best portability in the DAP market with class-leading playback time and output power. The compact size of the SR35 fits easily in your pocket, and weighing in at only 6.5 oz, it's light enough to carry without inconvenience. With a max continuous playback time of 20-hours, you can enjoy music all day without recharging.

New Experience, New User Interface

The SR35 comes with a redesigned Crimson-themed UI/UX, transforming it into a deeply connective true music player. It's designed for quick music category browsing and re-experiencing forgotten songs. A&K added an easy album art search function for re-discovery and heightened interaction of music album art while listening.

Specifications

Material: Aluminum
Supported OS: Windows 10, 11 (32/64bit) | MAC OS X 10.7
Astell&Kern 1 Year Warranty
Display: 3.6”, 720 x 1280 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] UNBAL 2.1Vrms | BAL 4Vrms (No Load)
- [High] UNBAL 3.1Vrms | BAL 6Vrms (No Load)
CPU: Quad-Core
DAC: Cirrus Logic CS43198 (x4) (Quad-DAC)
Decoding: Support up to 32-Bit/384kHz Bit-to-Bit Playback
Input: USB-C (for charging & PC/MAC)
Outputs
- UNBAL: (3.5mm), Optical (3.5mm)
- BAL: 2.5mm, 4-pole supported | 4.4mm, 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: 2.5" x 4.3” x 0.63"
Weight: About 6.5oz
Firmware upgrade supported (OTA)
Operating Temp: 0℃ ~ + 40℃ (32℉~ 104℉)

Audio (Normal Gain)

Frequency Response
- ±0.012dB (20Hz~20kHz) UNBAL
- ±0.125dB (20Hz~70kHz) UNBAL
- ±0.011dB (20Hz~20kHz) BAL
- ±0.126dB (20Hz~70kHz) BAL
S/N: 127dB @ 1kHz, UNBAL │ 130dB @ 1kHz, BAL
Crosstalk: -133dB @ 1kHz, UNBAL │ -145dB @ 1kHz, BAL
THD+N: 0.0005% @ 1kHz, UNBAL │ 0.0006% @ 1kHz, BAL
IMD SMPTE: 0.0002% 800Hz 10kHz (4:1) UNBAL │ 0.0002% 800Hz 10kHz (4:1) BAL
Output Impedance: 1.1Ω, UNBAL 3.5mm │ 2.7 Ω, BAL 2.5mm, 4.4mm

Clock Source

Jitter: 25ps (Typ)
Reference Clock Jitter: 70ps

Storage Capacity

Built-In Memory: 64GB [NAND]
External Memory: (x1) microSD (Max. 1TB)

Battery

Capacity: 3150mAh, 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, UNBAL, Vol. 50, LCD Off, Dual DAC Mode)

In the Box

SR35 Device
USB-C Cable
Quick Start Guide
microSD card slot cover
Protective Films
Case not Included | Purchase Separately