Astell&Kern PD5 DAP: The SR35's Long-Awaited Successor Built for All-day Listening
Read Time: Approx. 6 min.
**Still actively reviewing and working on detailed sound impressions. Will be finalized on September 2, 2026.**
TL;DR
- The Astell&Kern PD5 is the successor to the SR35, bringing Octa-DAC architecture to the PD series
- Dual Drive Mode lets you choose balanced sound or ultimate sound
- Smart features like EnviroTune and ESA adapt sound quality to your environment and reduce distortion
- Full streaming support with Dual-Band Wi-Fi, Roon Ready, Qobuz Connect, and BT Sink
- Available for presale now at Moon Audio
Introducing the Astell&Kern PD5: The Next Chapter in the PD Series
Astell&Kern is expanding its latest DAP line, the PD series, and the wait is almost over. The Astell&Kern PD5 Digital Audio Player is the latest DAP from the portable hi-fi moguls, now available for presale. It arrives as the successor to the well-loved SR35 DAP and the newest entry in a series built around one simple idea: portable hi-fi that never asks you to compromise.
The SR35 proved that a compact DAP could still deliver serious sound, and it was a serious contender for audiophiles branching into portable gear–that is until it phased out and was marked as a legacy product. The PD5 enters the picture as the portable device that pushes the idea even further. It pairs a refined, ergonomic design with a substantial leap in internal architecture, giving listeners a player that's just as comfortable on a daily commute as it is at the center of a dedicated listening session.
The PD5 is currently available for presale directly through Moon Audio.
PROS
- Powerful sound architecture delivers exceptional dynamic range and channel separation
- Flexible performance and long-term battery life
- Modern connectivity options
CONS
- Feature-dense learning curve that may be overwhelming at first for new users
The Basics: What to Know
- Octa-DAC Architecture: Eight CS43198 DACs for wide dynamic range and channel separation
- Dual Drive Mode: Switch between balanced and ultimate sound
- Up to 28 hours of playback
- EnviroTune: Auto-compensates for ambient noise without raising volume
- ESA (Enhanced Signal Alignment): Minimizes group delay for clearer sound
- TERATON ALPHA: AK's tech for noise removal and stable amplification
- Digital Audio Remaster (DAR): Upsamples PCM to 384kHz and DSD to DSD128
- 4 Selectable DAC Filters
- Crossfeed Technology: Speaker-like soundstage with adjustable settings
- ReplayGain: Automatic volume normalization
- Dual-Band Wi-Fi: High-res streaming with Roon Ready support
- Bluetooth Sink: Stream audio wirelessly from external devices
- Roon Ready & Qobuz Connect Certified
- Compact, Ergonomic Design: ~200g, curved 4.1" display, "Grip Control" build
Design Built Around "Grip Control"
The PD5's design philosophy centers on what Astell&Kern calls "Grip Control"–a form factor engineered to feel effortless in the hand while staying true to the sleek, minimalist look that defines the PD series.
- Compact and Lightweight: Weighing in at roughly 6.98 ounces, the PD5 is easy to carry and comfortable to hold for extended listening sessions.
- Curved 4.1-inch Display: Shaped for natural, ergonomic use, making on-device navigation and control simple.
- Thoughtful Symmetry: The microphone and power button sit in a balanced, top-mounted arrangement that ties form and function together
Sound Architecture: Octa-DAC Power
At the heart of the PD5 is an Octa-DAC architecture, powered by eight CS43198 DACs working together to deliver a wide dynamic range and precise channel separation. This is a step up in the PD series' internal sound processing aimed at capturing finer musical detail. To match different listening needs, the PD5 offers Dual Drive Mode, letting users toggle between two configurations:
Quad-DAC
Balanced Sound (Natural and Smooth)
Efficient Power
6Vrms
28 Hours Playback
Octa-DAC
Ultimate Sound (Greater Details)
Maximum Performance
8Vrms
15 Hours Playback
This means listeners can choose all-day battery life for travel days or switch to maximum fidelity when they have time to sit down and really listen.
Smart, Adaptive Listening Features
The PD5 inherits some of Astell&Kern's top sound shaping features, putting the user in the driver's seat of their listening experience:
- EnviroTune: An intelligent sound-tuning feature that uses the player's built-in microphone to analyze ambient noise in real time, automatically compensating for frequencies that tend to get lost in noisy environments.
- ESA (Enhanced Signal Alignment): Reduces group delay, aligning frequency signals so they arrive more uniformly and reducing distortion for a cleaner, more precise sound.
- Digital Audio Remaster (DAR): Upsampling technology that pushes played tracks toward higher sample rates, aiming to bring recordings closer to true analog detail.
- Four selectable DAC Filters & Crossfeed settings, giving listeners granular control over their sound signature, including a more speaker-like soundstage through headphones.
- ReplayGain, for automatic volume normalization across tracks (supporting files up to 24-bit/192kHz).
Dragon Cables
There are a lot of reasons why you need to make sure your audio cables are not afterthoughts.
Our HiFi Audio Dragon Cables bring out more of what you love in your music and audio gear. If you love your headphones but wish they had a bit more top-end sparkle - a Silver Dragon Headphone Cable would be a great option. If your USB cables keep dying - as many stock cables do - then check out our quality USB Audio Cables. We say time and time again that materials matter, and our audio cables and custom geometries actually help to bring out those desired properties in your gear and music. We make tons of custom options for our customers so that you can get the right HiFi Audio cable for your exact needs. If you have any questions feel free to Contact Us and we'll be more than happy to help.
Generally, stock audio cables are manufactured with subpar materials, metals with impurities, poor geometries, and an overabundance of layers to make them look and feel like a fire hose. Inconsistency and lack of quality control in stock cables can lead to poor sound quality and a veiled sound vs. what the musician intended for you to hear and feel from the music. Dragon Audio Cables are handcrafted with the highest standards and made to order according to your specific needs. At Moon Audio, we create a custom cable for you using the highest quality UP-OCC silver or copper conductors that can be manufactured. UP-OCC metals are void of impurities and are optimized for signal transfer and sound quality. We have one of the largest collections of audio and headphone connection options available online and we create limitless audio cable options depending on your specific gear and needs.
Why Dragon Cables?
You’ve heard the saying that a chain is only as strong as its weakest link, right? Well, the same applies to your brand new audiophile-grade headphone or other audio components. The weakest link, in this case, is your stock audio cable or the cheap interconnects the manufacturer threw in the box just to get you up and running. Why is the audio cable always an afterthought, when it’s just as important as the rest of your system? At Moon Audio, we use the purest and best raw materials in our cables to unveil your music. We believe that materials matter and your audio cables should have the same care and craftsmanship that manufacturers put into their audio components and headphones. Audio cables are ultimately the connection to your music. The fact remains that cabling is often considered the last priority to that of the main product and a means to cut down the overall production costs. It’s as simple as that. Dragon Cables elevate every note - as if you were hearing your favorite music for the very first time.
Verdict
Engineered for effortless portability, the Astell&Kern PD5 DAP delivers musc with total freedom and comfort, without ever compromising on performance or sound quality. Designed to fit comfortably in one hand, the PD5 combines a compact form factor with all-day battery life. It goes far beyond the physical limits of its size, delivering Astell&Kern's signature sound quality: Deep, detailed, and rich.
The PD5 strikes the perfect balance between portability and high performance, bringing the ultimate audio experience to your everyday life. Reserve your PD5 DAP today at Moon Audio.
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What's in the Box
- PD5 Digital Audio Player
- USB-C Charging Cable
- Warranty and Manual
Specifications
Model: PD5
Body Color: Silver
Body Material: Aluminum
Supported OS: Windows 8, 10, 11 (32/64-bit) MAC OS
Dimensions: 2.74" (69.7mm) [W] x 4.71" (119.7mm) [H], 0.63" (16.1mm) [D]
Weight: about 6.98 oz (198g)
Display: 4.1-inch 720 x 1280 touchscreen
Built-In Memory: 64GB [NAND]
External Memory: microSD x1 (Max. 1.5TB)
Battery: 4,000mAh 3.8V Li-Polymer
Charging Time: Approximately 2.5 hours (PD3.0 charging)
Continuous Playback Time: Approx. 28 hours (Standard: FLAC, 16-bit, 44.1kHz, Vol.50, Quad-DAC, LCD Off)
CPU: Octa-core
Wi-Fi: 802.11 a/b/g/n/ac (2.4/5GHz)
Bluetooth: V5.3 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC, LHDC, SBC, AAC)
Operating Temperature: 0℃ ~ + 40℃ (32℉~ 104℉)
Feature Enhancements: Firmware upgrade supported (OTA)
DAC: Cirrus Logic CS43198 x8 (Octa-DAC)
Input: USB Type-C Input (for charging, PC & MAC)
Outputs: Unbalanced Out (3.5mm), Balanced Out (4.4mm, only 5-pole supported)
Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF
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:
- [Quad] Unbalanced 3Vrms │ Balanced 6Vrms (Condition No Load)
- [Octa] Unbalanced 4Vrms │ Balanced 8Vrms (Condition No Load)
Decoding: Support up to 32-bit/384kHz Bit to Bit playback
Frequency Response:
- ±0.011dB (Condition: 20Hz~20kHz) Unbalanced │ ±0.011dB (Condition: 20Hz~20kHz) Balanced
- ±0.130dB (Condition: 20Hz~70kHz) Unbalanced │ ±0.143dB (Condition: 20Hz~70kHz) Balanced
S/N: 125dB @ 1kHz, Unbalanced │ 129dB @ 1kHz, Balanced
Crosstalk: -145dB @ 1kHz, Unbalanced │ -147dB @ 1kHz, Balanced
THD+N: 0.0006% @ 1kHz, Unbalanced │ 0.0006% @ 1kHz, Balanced
IMD SMPTE: 0.0003% 800Hz 10kHz (4:1) Unbalanced │0.0001% 800Hz 10kHz (4:1) Balanced
Output Impedance: Unbalanced Out 3.5mm (0.6 ohm) | Balanced Out 4.4mm (1.2 ohm)
Clock Jitter: 25pS (Typ.)
Reference Clock Jitter: 250 Femto Seconds
