SPECIFICATIONS

AIYIMA Model: D20

Bluetooth: Yes

Brand Name: Aiyima

D/A Converter: AKM AK4493SEQ+ESS ES9039Q2M

DSD Sampling Frequencies: 11.2896 MHz (DSD256),22.5792 MHz (DSD512),2.8224 MHz (DSD64)

Dimensions (W x H x D): 190*142*46mm

Electrified: No

High-concerned chemical: none

Input Format: RCA/XLR

Inputs: Optical (SPDIF),Coaxial,USB Type-C

Material: Metal

Model Number: AIYIMA D20

Origin: Mainland China

Outputs: RCA,Balanced Out

PCM Sampling Frequencies: 96 kHz,192 kHz,768 kHz

PCM Word Length: 24-bit,32-bit

Type: Portable

USB Compatibility: Windows 10,Android,iOS

Selling Point：

• High-Performance Dual DAC Chips： Equipped with ESS9039 and AK4493 USB DAC chips, delivers exceptional audio clarity and precision, ensuring high-fidelity sound reproduction for discerning listeners

• Bluetooth 5.1 Wireless Connectivity :Featuring Bluetooth 5.1, this digital audio receiver offers stable, low-latency wireless streaming with extended range and improved power efficiency for seamless audio transmission.

• DSD512 Support for High-Resolution Audio :D20 supports up to DSD512, enabling playback of ultra-high-resolution audio files, providing a rich, detailed listening experience for audiophiles.

• Digital VU Meter for Real-Time Audio Feedback: Includes a built-in Digital VU Meter that visually displays audio levels in real time, enhancing the user experience with precise monitoring of signal strength and dynamics.

Notes & Playback Limits

UAC 1.0 Limitation:
Driver-free UAC 1.0 mode supports up to 96kHz. To enable Native DSD512 decoding, please switch to UAC 2.0 mode.

Windows Native DSD Playback:
For native DSD bitstream playback on Windows PCs, the official ASIO driver must be installed and configured with the Foobar2000 ASIO output plugin.

MAC OS System Limitation:
Although MAC OS supports driver-free operation, system kernel limitations restrict native playback to DSD DOP256 at maximum.

Optical & Coaxial Bandwidth Limitation:
Optical and coaxial inputs support up to PCM 192kHz or DSD (DOP) 64. No audio output will be available if the source signal exceeds these specifications.

Output Level Difference:
The balanced XLR output provides up to 4Vrms, while the RCA output provides 2Vrms. Please note the 2× output level difference when connecting downstream amplifiers or active speakers.

Note:

* ARC requires TV support and PCM output setting. Due to protocol differences among TV brands, minor compatibility issues may occur with certain models.

In ARC mode, TV volume control is unavailable. Please adjust the volume using the D20 knob or its remote.

Product parameter:

DAC Chip: AKM AK4493SEQ + ESS ES9039Q2M

USB Chip: XMOS XU316

Op-amp chip: LME49720*4 (replaceable)

Bluetooth chip: QCC5125

Replaceable op-amp chips: NE5532P, OPA1612, OPA2604, MUSES02, etc.

Maximum sampling rate:

USB sampling rate: PCM 768kHz 32bit, DSD512 DSD (DOP) 256

Optical/fiber sampling rate: PCM 192kHz/24bit, DSD (DOP) 64

ARC sampling rate: PCM 192kHz/24bit

Bluetooth sampling rate: 24bit/96kHz

USB operating system: Windows 10 / 11 / MAC / Linux / Android / iOS

SINAD: ≥ 113dB

SNR: ≥ 124dB

Dynamic range: ≥ 120dB

Channel separation(Crosstalk): -130 dB

Distortion (THD+N): 0.0002%

Frequency response: 20-20kHz (±0.2dB)

Noise floor: ≤ 2μV

RCA output level: 2Vrms

XLR output level: 4Vrms

Inputs: Bluetooth/USB/Optical*2/Coaxial/ARC

Outputs: RCA*2/XLR

USB mode:USB 1.0/2.0

Supported devices: Phone, Tablet, PC, MP3 Player, TV, Streamer, CD Player, etc.

Bluetooth version: 5.1

Bluetooth encoding format: SBC, AAC, APTX, APTX-HD, LDAC

Power Supply: DC 12V (5.5×2.1mm)

Product size: 190*142*46mm

Packaging size: 296*228*77mm

Net product weight: 950g

Including packaging weight: 1700g

Package Include:

• D20 x1

• Remote control x1

• 12V Trigger Cable x1

• USB-A/C to USB-C Cable x1

• Optical Fiber Cable x1

• Power Adapter 12V x1

• User Manual x1

• • Warranty Card x1

  
  

  FAQ – Knob Operation Guide

  Q: Why doesn't a short press power off the D20?

  A: On the home screen, a short press returns to the Home Page by design.

  
  

  Q: How do I power off the D20?

  A: Press and hold the volume knob for more than 2 seconds.

  
  

  Q: What does a short press do in the Settings menu?

  A: It acts as Confirm/Select.

  
  

  Q: How do I go back to the previous menu?

  A: Double-click the volume knob.

  
  Q: Why does the D20 mute when adjusting volume?

  A: A quick press during adjustment may trigger the Mute/Unmute function.

   

  Q: How should I adjust the volume correctly?

  A: Rotate the knob smoothly and avoid pressing it while turning.

   

  Q: Does the D20 protect against sudden loud volume?

  A: Yes. Built-in volume memory and startup protection help prevent volume spikes.

   

  Q: Does double-click have other functions?

  A: On the home screen, double-click toggles Mute/Unmute. In menus, double-click returns to the previous page.

   

  Q: Why can't my phone find the D20 via Bluetooth?

  A: Make sure the D20 input source is switched to BT (Bluetooth) mode.

   

  Q: How do I clear Bluetooth pairing records?

  A: In BT mode, press and hold the Back button on the remote for 2 seconds.

   

  Q: Which UAC mode should I use when connecting a PS5 or Nintendo Switch?

  A: Always select UAC 1.0 mode. PS5 and Nintendo Switch do not support standard UAC 2.0 high-speed USB audio drivers. Using UAC 2.0 may result in no sound or severe audio distortion.

   

  Q: Why does the USB driver installation fail on Windows?

  A: Windows security software or outdated system certificates may block the driver installation.

   

  Q: How can I resolve driver installation being blocked?

  A: Temporarily disable antivirus software, then run the driver installer as Administrator.

   

  Q: Why is the device not recognized after a Windows update?

  A: System updates may affect USB audio drivers. Unplug the USB cable, reinstall the driver, and reconnect the device.

   

  Q: What should I do if the USB connection is not detected?

  A: Try a rear-panel USB 3.0/3.1 port and use a high-quality USB data cable.

   

  Q: Why is the maximum sample rate in Windows limited to 24Bit/192kHz?

  A: Windows shared audio mode limits the selectable sample rate. This is a normal system restriction.

   

  Q: How can I achieve PCM 768kHz and Native DSD512 playback?

  A: Use professional audio players such as Foobar2000 or Audirvana with the official ASIO driver and Native DSD support.

   

  Q: Why do I hear loud white noise when playing DSD files?

  A: Ensure DSD is transmitted in DoP/Native DSD mode and keep both system and player volume at 100%.

   

  Q: Why does DSD playback sound about 3dB lower than PCM?

  A: This is normal and follows the SACD/DSD recording standard to prevent digital clipping.

   

  Q: Why doesn't my phone or tablet output audio through the D20 via OTG?

  A: Make sure OTG is enabled in your device settings before connecting the D20.

   

  Q: What audio output format should I select on my TV?

  A: Set the TV's digital audio output to PCM Stereo for proper decoding.

   

  Q: Why should I turn off the power amplifier before powering off the D20?

  A: This helps prevent power-off transients from being amplified and protects your speakers.

   

  Q: How should I adjust volume when switching from RCA to XLR?

  A: XLR output is 4Vrms, while RCA is 2Vrms. Reduce the volume before switching to XLR.

   

  Q: Why does the VU meter remain active at low volume levels?

  A: The D20 uses an adaptive display algorithm to maintain smooth and responsive VU meter movement.

   

  Q: Do I need to restart the device when switching between ES9039Q2M and AK4493SEQ?

  A: No. The D20 supports real-time DAC switching without restarting or powering off.

   

  Q: What is BYPASS mode?

  A: BYPASS mode bypasses the preamp and volume control stages, sending the DAC signal directly to the power amplifier. Volume control must then be adjusted on the amplifier.