Topping D50 III Desktop HiFi DAC User Manual

1. Introduction

Thank you for choosing the Topping D50 III Desktop HiFi DAC. This device is designed to provide high-fidelity audio conversion, featuring dual ES9039Q2M DAC chips for superior sound quality, LDAC wireless connectivity, and flexible output options. This manual will guide you through the setup, operation, and maintenance of your D50 III.

The D50 III is engineered for audiophiles and enthusiasts seeking pristine audio reproduction from various digital sources. Its robust design and advanced circuitry ensure a premium listening experience.

2. What's in the Box

Please check the contents of your package to ensure all items are present:

• Topping D50 III DAC Unit
• Remote Control
• USB A-C Cable
• USB C-C Cable
• Bluetooth Antenna
• Product Information Card
• Guide for Bluetooth Remote

Image: Diagram showing the Topping D50 III unit, remote control, USB A-C cable, USB C-C cable, Bluetooth antenna, product information card, and Bluetooth remote guide.

3. Product Overview

The Topping D50 III features a sleek, compact design with intuitive controls and comprehensive connectivity options.

Front Panel

Image: Front view of the Topping D50 III, showing the power button, display screen, and navigation/volume buttons.

• Power Button: Press to turn on/off, short press to cycle through inputs.
• Display Screen: Shows current input, sample rate, and volume level.
• Navigation/Volume Buttons: Used for menu navigation and volume adjustment.

Rear Panel

Image: Rear view of the Topping D50 III, displaying various input and output ports including RCA, Optical, Coaxial, USB-C, Bluetooth antenna connector, 12V Trigger, and Power input.

• RCA Outputs (L/R): Unbalanced analog audio output.
• TRS Outputs (L/R): Balanced analog audio output.
• Coaxial Input: Digital audio input.
• Optical Input: Digital audio input.
• USB-C Input: Digital audio input for PC, Mac, Linux, iOS/Android devices.
• BT (Bluetooth) Antenna Connector: For wireless audio reception.
• 12V Trigger: Allows synchronous power on/off with compatible devices.
• Power Input: DC power input.

Key Features

• Dual ES9039Q2M DACs: Utilizes two ES9039Q2M chips for improved SNR, dynamic range, and lower distortion.
• New I/V Conversion Circuit: Designed for enhanced audio reproduction with lower distortion and noise.
• LDAC Wireless: Equipped with QCC5125 and Bluetooth 5.1, supporting LDAC/aptX-Adaptive/aptX-HD/AAC/SBC up to 96kHz/24bit.
• Plug and Play USB: Compatible with Windows 10/11, MAC, Linux, iOS/Android. Supports PCM768kHz/32bit and DSD512.
• Versatile Output Modes: Features RCA and TRS balanced outputs with selectable 4V/2V or 5V/2.5V modes.
• Preamplifier Function: Can operate in DAC mode or Preamp mode, allowing volume control for active speakers or power amplifiers.

Image: Infographic highlighting key features such as Dual ES9039Q2M, Hi-Res Audio certification, LDAC support, new I/V conversion, Dual Type-C, low THD+N, DSD/PCM support, precise PEQ adjustment, and a new Bluetooth remote control.

Image: Detailed diagram illustrating the dual ES9039Q2M DAC chip architecture within the D50 III, emphasizing the separate chips for left and right channels.

4. Setup

Follow these steps to set up your Topping D50 III DAC:

1. Connect Power: Connect the provided power adapter to the D50 III's power input and then to a wall outlet.
2. Connect Audio Output: Choose your preferred output method:
   • RCA: Connect RCA cables from the D50 III's RCA outputs to your amplifier or active speakers.
   • TRS (Balanced): Connect TRS cables from the D50 III's TRS outputs to your balanced amplifier or active speakers.
3. Connect Audio Input: Choose your desired digital audio input:
   • USB: Connect a USB cable (A-C or C-C) from your computer, smartphone, or tablet to the D50 III's USB-C input. For Windows, you may need to install the Thesycon driver from the Topping website.
   • Optical/Coaxial: Connect an optical or coaxial cable from your digital audio source (e.g., CD player, TV) to the corresponding input on the D50 III.
   • Bluetooth: Screw the Bluetooth antenna onto the BT connector on the rear panel.
4. Power On: Press the power button on the front panel or the remote control to turn on the D50 III.
5. 12V Trigger (Optional): If you have a compatible device (like the Topping A50 III) that supports 12V Trigger, connect a 12V trigger cable between the D50 III and the other device for synchronized power control.

Image: Close-up view of the rear panel of the D50 III, showing the 12V Trigger port with a cable connected, illustrating its use for synchronized power control with other devices.

Image: The Topping D50 III stacked with a Topping A50 III amplifier on a desk next to a laptop and headphones, demonstrating a typical setup where both devices are used together.

5. Operating Instructions

Basic Operation

• Power On/Off: Press the power button on the front panel or the remote.
• Input Selection: Short press the power button on the front panel to cycle through USB, Optical, Coaxial, and Bluetooth inputs. Alternatively, use the input selection buttons on the remote.
• Volume Control: Use the '+' and '-' buttons on the front panel or the remote to adjust the volume.
• Mute: Press the mute button on the remote control to mute/unmute the audio output.

Menu Settings

The D50 III offers various settings accessible via the menu. Use the navigation buttons on the front panel or remote to enter and navigate the menu.

• Output Mode: Select between 4V/2V (standard) and 5V/2.5V (high output) modes for RCA and TRS outputs.
• DAC/Preamp Mode: Choose between pure DAC mode (fixed output) or Preamp mode (variable output with volume control).
• Bluetooth Pairing: Enter the Bluetooth menu to pair with new devices.
• Display Brightness: Adjust the brightness of the display screen.
• Filter Settings: Select different digital filter modes (if available) to fine-tune the sound.

6. Specifications

The following table details the technical specifications of the Topping D50 III DAC:

Note: The above data is the result obtained from TOPPING lab test under AC220V 50Hz and D50 III set to 5V output mode.

Image: A table displaying detailed technical specifications for the Topping D50 III DAC, including THD+N, SNR, Dynamic Range, Frequency Response, Output Level, Noise, Channel Crosstalk, Channel Balance, and Output Impedance for both RCA and TRS outputs.

General Specifications

• Product Dimensions: 4.92 x 3.94 x 0.1 inches
• Weight: 2.05 Pounds
• Mounting Type: Desk Mount
• Maximum Supply Voltage: 5 Volts
• Minimum Supply Voltage: 5 Volts
• Country of Origin: China

7. Maintenance

To ensure the longevity and optimal performance of your Topping D50 III, please follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to wipe the exterior of the unit. Avoid using abrasive cleaners, solvents, or chemical sprays, as they may damage the finish or internal components.
• Placement: Place the D50 III on a stable, flat surface away from direct sunlight, heat sources, and excessive moisture. Ensure adequate ventilation around the unit.
• Connections: Periodically check all cable connections to ensure they are secure and free from dust or corrosion.
• Storage: If storing the unit for an extended period, disconnect it from power and store it in a cool, dry place.

8. Troubleshooting

If you encounter issues with your D50 III, refer to the following common problems and solutions:

• No Sound Output:
  • Ensure the D50 III is powered on.
  • Verify that the correct input source is selected on the D50 III.
  • Check all audio cable connections between the D50 III and your amplifier/speakers.
  • Ensure your amplifier/speakers are powered on and set to the correct input.
  • Check the volume level on the D50 III and your amplifier/speakers; ensure it is not muted.
  • If using USB, ensure the correct audio output device is selected in your computer's sound settings and that the necessary drivers are installed for Windows.
• Distorted Sound:
  • Check if the input source's volume is too high, causing clipping.
  • Ensure cables are securely connected and not damaged.
  • Verify that the sample rate and bit depth settings on your source device are compatible with the D50 III.
  • Try a different audio file or source to rule out source-related issues.
• Bluetooth Connection Issues:
  • Ensure the Bluetooth antenna is securely attached.
  • Make sure the D50 III is in Bluetooth input mode.
  • Unpair and re-pair the D50 III with your Bluetooth device.
  • Ensure no other devices are interfering with the Bluetooth signal.
  • Try moving your Bluetooth device closer to the D50 III.
• Remote Control Not Working:
  • Check the battery in the remote control and replace if necessary.
  • Ensure there are no obstructions between the remote and the D50 III.
  • Point the remote directly at the D50 III's front panel.

If the problem persists after trying these solutions, please contact customer support.

9. Warranty and Support

For information regarding the product warranty, please refer to the warranty card included in your product packaging or visit the official LEAUDIO/Topping website. Warranty terms and conditions may vary by region and retailer.

For technical support, troubleshooting assistance beyond this manual, or service inquiries, please contact the retailer where you purchased the product or visit the official LEAUDIO/Topping support website. Please have your product model and serial number ready when contacting support.

Manufacturer: LEAUDIO