Fanmusic Topping DX3 Pro+ DAC and Headphone Amplifier User Manual

1. Introduction

The Topping DX3 Pro+ is a high-performance Digital-to-Analog Converter (DAC), headphone amplifier, and pre-amplifier designed to deliver exceptional audio quality. It features an ES9038Q2M DAC chip, NFCA headphone amplifier circuit, and Bluetooth 5.0 with LDAC support, offering versatile connectivity and superior sound reproduction for various audio setups.

2. Safety Information

• Do not disassemble or modify the device. Unauthorized modifications may void the warranty and pose safety risks.
• Keep the device away from water, moisture, and extreme temperatures.
• Use only the provided power adapter. Using an incorrect power supply can damage the device.
• Ensure proper ventilation around the device to prevent overheating.
• Avoid exposing the device to direct sunlight or heat sources.
• Do not block ventilation openings.
• Disconnect the power cable during lightning storms or when unused for extended periods.

3. Product Overview

3.1 Front Panel

Figure 3.1: Front view of the Topping DX3 Pro+ in silver. The front panel features a digital display showing current input and sample rate, a 3.5mm headphone output jack, and a multi-function knob for volume control and menu navigation.

• Display: Shows current input source, sample rate, and volume level.
• Headphone Output: 3.5mm jack for connecting headphones.
• Multi-function Knob: Rotates to adjust volume, press to select menu options or change input.

3.2 Rear Panel

Figure 3.2: Rear view of the Topping DX3 Pro+ in black. From left to right, it includes RCA Left and Right outputs, two Coaxial inputs (COAX 1, COAX 2), an Optical input, a USB-B input, a Bluetooth antenna connector, and a DC 15V power input.

• RCA Output (L/R): Analog line outputs for connecting to a power amplifier or active speakers.
• Coaxial Input (COAX 1, COAX 2): Digital audio inputs.
• Optical Input: Digital audio input.
• USB Input: USB-B port for connecting to a computer or other USB audio source.
• Bluetooth Antenna: Connector for the included Bluetooth antenna.
• DC 15V Power Input: For connecting the external power adapter.

3.3 Dimensions

Figure 3.3: Physical dimensions of the DX3 Pro+. The unit measures approximately 12.0 cm in width, 16.5 cm in depth, and 4.0 cm in height.

4. Setup

1. Connect Power: Connect the provided DC 15V power adapter to the DX3 Pro+ and then to a power outlet.
2. Attach Bluetooth Antenna: Screw the included Bluetooth antenna onto the antenna connector on the rear panel.
3. Connect Audio Source:
   • USB: Connect a USB-B cable from your computer or audio source to the USB input on the DX3 Pro+.
   • Coaxial/Optical: Connect your digital audio source (e.g., CD player, TV) to the COAX 1, COAX 2, or Optical inputs.
   • Bluetooth: Ensure the antenna is connected. The device will be discoverable for pairing.
4. Connect Audio Output:
   • Headphones: Plug your headphones into the 3.5mm headphone jack on the front panel.
   • External Amplifier/Active Speakers: Connect the RCA outputs on the rear panel to your power amplifier or active speakers using RCA cables.
5. Install Drivers (for USB on Windows): For optimal performance with Windows computers, it is recommended to download and install the latest USB drivers from the official Topping website. For macOS and Linux, drivers are typically not required.

5. Operating Modes

The DX3 Pro+ offers four distinct output modes to suit various audio setups. These modes can typically be cycled through by pressing the multi-function knob or using the remote control.

• Headphone Amp Mode: Audio is output only through the 3.5mm headphone jack. The RCA outputs are inactive.
• Headphone Amp + Line Out Mode: Audio is simultaneously output through both the 3.5mm headphone jack and the RCA line outputs. The volume control affects both outputs.
• DAC Mode (Fixed Line Out): Audio is output only through the RCA line outputs at a fixed, maximum volume level. The headphone output is inactive, and the volume knob does not control the RCA output. This mode is suitable when connecting to a pre-amplifier or integrated amplifier with its own volume control.
• Pre-amplifier Mode (Variable Line Out): Audio is output only through the RCA line outputs, and the volume can be adjusted using the multi-function knob. The headphone output is inactive. This mode is suitable for connecting directly to a power amplifier or active speakers where the DX3 Pro+ acts as the volume controller.

6. Bluetooth Connectivity

The DX3 Pro+ supports Bluetooth 5.0 with LDAC, AAC, SBC, aptX, aptX LL, and aptX HD protocols, allowing for high-quality wireless audio streaming.

1. Select Bluetooth Input: Use the multi-function knob or remote control to select "BT" as the input source on the DX3 Pro+. The display will indicate Bluetooth mode.
2. Enable Pairing Mode: The device should automatically enter pairing mode when Bluetooth input is selected for the first time or if no device is connected. If not, consult the full manual for specific pairing instructions (often involves a long press of the knob or a remote button).
3. Pair with Device: On your smartphone, tablet, or computer, go to Bluetooth settings and search for available devices. Select "Topping DX3 Pro+" from the list to pair.
4. Start Streaming: Once paired, audio from your device will be streamed wirelessly to the DX3 Pro+.

Figure 6.1: The DX3 Pro+ utilizes the QCC5125 Bluetooth chipset, supporting high-resolution wireless audio codecs like LDAC.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use liquid cleaners or abrasive materials.
• Storage: If storing the device for an extended period, disconnect it from power and store it in a cool, dry place.
• Ventilation: Ensure that the ventilation holes are not obstructed to maintain proper airflow and prevent overheating.

8. Troubleshooting

9. Specifications

• Model: DX3 Pro+
• DAC Chip: ES9038Q2M
• Bluetooth Chipset: QCC5125
• Bluetooth Version: 5.0
• Bluetooth Codecs: LDAC, AAC, SBC, aptX, aptX LL, aptX HD
• USB Input: Supports DSD512, PCM up to 768kHz
• Headphone Amplifier: NFCA circuit, optimized for ultra-low noise and distortion.
• Output Power (Headphone): 1800mW x 2 @ 32Ω, 250mW x 2 @ 300Ω
• Output Modes: Headphone Amp, Headphone Amp + Line Out, DAC (Fixed Line Out), Pre-amplifier (Variable Line Out)
• Inputs: USB, Coaxial (x2), Optical, Bluetooth
• Outputs: 3.5mm Headphone Jack, RCA L/R
• Dimensions: Approximately 12.0 cm (W) x 16.5 cm (D) x 4.0 cm (H)
• Weight: 1.8 pounds (approx. 0.82 kg)
• Power Input: DC 15V

Figure 9.1: Key features and specifications of the DX3 Pro+.

Figure 9.2: System framework diagram illustrating the internal signal processing and architecture of the DX3 Pro+.

Figure 9.3: Comparison of specifications between the DX3 Pro+ and the previous DX3Pro (LDAC Version).

10. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the documentation included with your purchase or contact the retailer or manufacturer directly. Keep your proof of purchase for warranty claims.

Manufacturer: TOPPING

Brand: Fanmusic

11. Official Product Videos

No official product videos from the seller are available in the provided data for embedding in this manual.