AIYIMA D20 Audio Decoder

AIYIMA D20 HiFi DAC Decoder AK4493SEQ ES9039Q2M XMOS XU316 USB DSD512 Bluetooth 5.1 LDAC RCA XLR Audio Converter VU

 

Features：

• 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.

 

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.