LEAUDIO D50 III
Topping D50 III Desktop HiFi DAC User Manual
Model: D50 III
1. Introducció
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. Què hi ha a la caixa
Si us plau, comproveu el contingut del paquet per assegurar-vos que hi hagi tots els elements:
- Topping D50 III DAC Unit
- Control remot
- Cable USB AC
- Cable USB CC
- Antena Bluetooth
- Targeta d'informació del producte
- 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. Producte acabatview
The Topping D50 III features a sleek, compact design with intuitive controls and comprehensive connectivity options.
Panell frontal

Imatge: Frontal view of the Topping D50 III, showing the power button, display screen, and navigation/volume buttons.
- Botó d'encesa: Press to turn on/off, short press to cycle through inputs.
- Pantalla de visualització: Mostra l'entrada actual, sample rate, and volume level.
- Navigation/Volume Buttons: Used for menu navigation and volume adjustment.
Panell posterior

Imatge: Part posterior 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.
- Sortides RCA (E/D): Unbalanced analog audio output.
- TRS Outputs (L/R): Balanced analog audio output.
- Entrada coaxial: Entrada d'àudio digital.
- Entrada òptica: Entrada d'àudio digital.
- Entrada USB-C: Digital audio input for PC, Mac, Linux, iOS/Android devices.
- Connector d'antena BT (Bluetooth): For wireless audio reception.
- Disparador de 12 V: Allows synchronous power on/off with compatible devices.
- Entrada d'alimentació: Entrada d'alimentació de CC.
Característiques clau
- 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.
- Modes de sortida versàtils: Features RCA and TRS balanced outputs with selectable 4V/2V or 5V/2.5V modes.
- PreampFunció lifier: Can operate in DAC mode or Preamp mode, allowing volume control for active speakers or power ampaixecadors.

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. Configuració
Follow these steps to set up your Topping D50 III DAC:
- Connectar l'alimentació: Connect the provided power adapter to the D50 III's power input and then to a wall outlet.
- Connecta la sortida d'àudio: Choose your preferred output method:
- RCA: Connect RCA cables from the D50 III's RCA outputs to your amplifier o altaveus actius.
- TRS (Balanced): Connect TRS cables from the D50 III's TRS outputs to your balanced amplifier o altaveus actius.
- Connecteu l'entrada d'àudio: 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 weblloc.
- Òptic/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.
- Encès: Press the power button on the front panel or the remote control to turn on the D50 III.
- 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.

Imatge: Primer pla 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. Instruccions de funcionament
Funcionament bàsic
- Encès/apagat: Press the power button on the front panel or the remote.
- Selecció d'entrada: 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.
- Control de volum: Use the '+' and '-' buttons on the front panel or the remote to adjust the volume.
- Silenciar: Press the mute button on the remote control to mute/unmute the audio output.
Configuració del menú
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.
- Mode de sortida: 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).
- Emparellament Bluetooth: Enter the Bluetooth menu to pair with new devices.
- Brillantor de la pantalla: Adjust the brightness of the display screen.
- Configuració del filtre: Select different digital filter modes (if available) to fine-tune the sound.
6. Especificacions
The following table details the technical specifications of the Topping D50 III DAC:
| Paràmetre | RCA | TRS |
|---|---|---|
| THD+N a 1 kHz (A-wt) | <0.00008% @1kHz | <0.00006% @1kHz |
| THD @20-20kHz (90kBW) | <0.0004 % @20-20kHz | <0.0002% @20-20kHz |
| SNR @MAX OUT 1 kHz (A-wt) | 127 dB a 1 kHz | 132 dB a 1 kHz |
| Interval dinàmic @ 1 kHz (A-wt) | 127 dB a 1 kHz | 132 dB a 1 kHz |
| Resposta de freqüència | 20Hz-20kHz (0.1dB), 20Hz-40kHz (0.3dB) | 20Hz-20kHz (0.1dB), 20Hz-40kHz (0.3dB) |
| Nivell de sortida | 2.0Vrms @0dBFS (4V Mode), 2.5Vrms @0dBFS (5V Mode) | 4.0Vrms @0dBFS (4V Mode), 5.0Vrms @0dBFS (5V Mode) |
| Soroll (pes A) | <1.1uVrms | <1.3uVrms |
| Canal Crosstalk | -136 dB a 1 kHz | -147 dB a 1 kHz |
| Balanç del canal | 0.3 dB | 0.3 dB |
| Impedància de sortida | 50Ω | 100Ω |
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.
Especificacions generals
- Dimensions del producte: 4.92 x 3.94 x 0.1 polzades
- Pes: 2.05 lliures
- Tipus de muntatge: Muntatge d’escriptori
- Volum de subministrament màximtage: 5 Volts
- Subministrament mínim Voltage: 5 Volts
- País d'origen: Xina
7. Manteniment
To ensure the longevity and optimal performance of your Topping D50 III, please follow these maintenance guidelines:
- Neteja: 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.
- Col·locació: Place the D50 III on a stable, flat surface away from direct sunlight, heat sources, and excessive moisture. Ensure adequate ventilation around the unit.
- Connexions: Periodically check all cable connections to ensure they are secure and free from dust or corrosion.
- Emmagatzematge: Si guardeu la unitat durant un període prolongat, desconnecteu-la de l'alimentació i guardeu-la en un lloc fresc i sec.
8. Solució De Problemes
If you encounter issues with your D50 III, refer to the following common problems and solutions:
- Sense sortida de so:
- 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/altaveus.
- Assegureu-vos el vostre 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.
- So distorsionat:
- Check if the input source's volume is too high, causing clipping.
- Assegureu-vos que els cables estiguin connectats correctament i que no estiguin danyats.
- Comproveu que el sample rate and bit depth settings on your source device are compatible with the D50 III.
- Prova un àudio diferent file or source to rule out source-related issues.
- Problemes de connexió Bluetooth:
- Assegureu-vos que l'antena Bluetooth estigui ben connectada.
- Make sure the D50 III is in Bluetooth input mode.
- Unpair and re-pair the D50 III with your Bluetooth device.
- Assegureu-vos que cap altre dispositiu interfereixi amb el senyal Bluetooth.
- Try moving your Bluetooth device closer to the D50 III.
- El control remot no funciona:
- Comproveu la pila del comandament a distància i substituïu-la si cal.
- Ensure there are no obstructions between the remote and the D50 III.
- Point the remote directly at the D50 III's front panel.
Si el problema persisteix després de provar aquestes solucions, poseu-vos en contacte amb l'atenció al client.
9. Garantia i Suport
For information regarding the product warranty, please refer to the warranty card included in your product packaging or visit the official LEAUDIO/Topping weblloc web. Els termes i condicions de la garantia poden variar segons la regió i el distribuïdor.
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 weblloc. Si us plau, tingueu a mà el model i el número de sèrie del producte quan us poseu en contacte amb el servei d'assistència.
Fabricant: LEAUDIO
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