Topping D70 Pro OCTO DAC User Manual

1. Introduction

The Topping D70 Pro OCTO is a high-performance Digital-to-Analog Converter (DAC) designed for audio enthusiasts. It incorporates advanced technology to deliver exceptional sound quality and versatile connectivity options. This manual provides detailed instructions for setting up, operating, and maintaining your D70 Pro OCTO DAC.

2. What's in the Box

• D70 Pro OCTO Unit
• Remote Control
• USB Cable
• AC Cable
• Bluetooth Antenna
• Quick Start Guide

Image: The D70 Pro OCTO DAC and its included accessories: remote control, USB cable, AC power cable, Bluetooth antenna, and quick start guide.

3. Key Features

• 8-Core CS43198 DAC Chips: Equipped with eight Cirrus Logic CS43198 flagship chips for detailed audio decoding.
• High-Resolution Audio Support: Supports PCM up to 768kHz/32bit and DSD512.
• Aurora UI: Features a full-color screen and three touch buttons for an intuitive user interface, allowing customization of playback information, FFT, or VU displays.
• Bluetooth 5.1 Transmission: Supports LDAC, aptX-Adaptive, aptX HD, AAC, and SBC for high-quality wireless audio streaming.
• Wide Compatibility: Plug-and-play functionality with Windows 10/11, MAC, Linux, iOS/Android. Windows users requiring ASIO applications benefit from the XMOS XU316 and Thesycon custom driver.
• Versatile Output Modes: Offers RCA single-ended output, XLR balanced output, or simultaneous use of both.
• Integrated Preamp Function: Can function as a preamp, allowing direct volume adjustment to power amplifiers or active speakers.
• Independent Volume Memory: Memorizes output volume for 'Single Ended', 'Balanced', and 'All' modes, reverting to the last used setting.
• 12V Trigger: Input and output interface for synchronized power control with other devices.

4. Setup

4.1 Power Connection

Connect the supplied AC cable to the D70 Pro OCTO and a suitable power outlet. Ensure the rear panel power switch is in the ON position after connecting.

4.2 Audio Connections

The D70 Pro OCTO offers both RCA single-ended and XLR balanced outputs. Choose the appropriate connection for your amplifier or active speakers.

Image: Rear panel connections of the D70 Pro OCTO, illustrating RCA, XLR, optical, coaxial, and USB input/output ports, along with the power input and switch.

4.3 Input Source Connection

Connect your audio source (e.g., computer, CD player, streamer) to the corresponding input ports (USB, Optical, Coaxial, Bluetooth) on the D70 Pro OCTO.

4.4 Bluetooth Antenna

Attach the Bluetooth antenna to the designated port on the rear panel for optimal wireless performance.

5. Operating Instructions

5.1 Power On/Off

Press the power button on the front panel or use the remote control to turn the unit on or off.

5.2 Input Selection

Use the touch buttons on the front panel or the remote control to cycle through available input sources (USB, Optical, Coaxial, Bluetooth).

5.3 Volume Control

Adjust the volume using the large knob on the front panel or the volume buttons on the remote control. If operating in DAC mode, volume is fixed at maximum; switch to PRE mode for adjustable volume.

5.4 Aurora UI and Display Modes

The full-color screen allows you to switch between various display modes, including playback information, FFT (Fast Fourier Transform), and VU (Volume Unit) meters. Customized functions are accessible by pressing the volume knob.

Image: The D70 Pro OCTO's Aurora UI displaying playback information, demonstrating the vibrant full-color screen.

5.5 Output Mode Selection

The D70 Pro OCTO supports RCA single-ended and XLR balanced outputs. You can select to use only one or both simultaneously. Additionally, you can choose between 4V and 5V output levels for XLR and RCA to match your connected equipment.

Image: A menu screen on the D70 Pro OCTO showing options to select output levels, specifically highlighting 4V and 5V settings for XLR and RCA outputs.

5.6 Bluetooth Pairing

To pair a Bluetooth device, enable the Bluetooth function in the setup menu. The unit will enter pairing mode. Bring your Bluetooth device close to the D70 Pro OCTO and select it from your device's Bluetooth list. If already connected to another device, press and hold the headphone button on the remote to enter pairing mode.

Image: A smartphone displaying a Bluetooth connection screen, wirelessly paired with the D70 Pro OCTO DAC, illustrating its Bluetooth 5.1 capability.

6. Specifications

Note: The above data is the result of testing in the TOPPING laboratory under AC220V 50Hz conditions.

Image: A detailed table of the D70 Pro OCTO DAC's technical specifications, including THD+N, SNR, DNR, and noise levels, alongside a visual representation of its performance.

7. Troubleshooting

If you encounter any issues with your Topping D70 Pro OCTO DAC, please refer to the following common problems and solutions. For more detailed troubleshooting, consult the official troubleshooting video.

7.1 Common Issues and Solutions

• Can't be turned on: Check power connection, rear panel power switch, try another power cable or outlet.
• No sound: Ensure proper input source is selected, check output settings, verify all connections, and confirm devices are not muted. For Bluetooth, adjust phone volume. For USB, check PC volume and driver settings.
• Noisy playback: Try different songs, ensure specifications are supported, adjust computer system volume for DSD files, check source/equipment/cables, consider a USB isolation device if noise disappears when unplugging USB.
• One channel with noise / no output: Check source, downstream equipment, and cables. Try swapping left and right channel connections.
• Channel imbalance: Set to C (Balance) in Setup Menu - Advance - Channel balance. Try swapping left and right channel connections.
• Cannot pair Bluetooth: Enable Bluetooth in setup menu. If already connected, press and hold headphone button on remote for pairing mode. Bring devices closer, remove obstructions, or try again.
• Bluetooth in: sound is cut off: Prevent electromagnetic interference by locating the unit away from microwave ovens, wireless LAN devices, etc. Reconnect Bluetooth device.
• Connected USB device does not recognize unit: Check USB cable connection, try another USB port, reinstall driver, or try with another PC. Some phones require OTG function to be enabled.
• Remote control not responding: Insert fresh AAA batteries, aim at remote receiver, bring remote closer. Use phone camera to check IR signal. If you have multiple Topping devices, ensure you are using the correct remote.
• Can't adjust unit's volume: If DAC mode is set, volume is fixed. Switch to PRE mode for adjustable volume.
• Sample rate displayed does not match music file: The unit displays the input signal's sample rate. For exclusive mode playback, the audio signal is not resampled. For non-exclusive mode, the computer/phone may resample the audio.
• DAC/DIR/PN voltage/5V voltage/FFT module abnormal: Disconnect other devices and reboot. If the problem persists, contact support.
• Firmware issues (damage, other firmware, unknown file, update failed, no firmware): Please re-flash the correct firmware.

7.2 Troubleshooting Video

Video: An official troubleshooting guide for the Topping D70 Pro OCTO DAC, covering various common issues and their resolutions.

8. Maintenance

• Keep the device in a dry, well-ventilated area.
• Avoid exposure to extreme temperatures or direct sunlight.
• Clean the exterior with a soft, dry cloth. Do not use liquid cleaners or solvents.
• Ensure proper ventilation around the unit to prevent overheating.

9. Warranty and Support

HIFI College, as an authorized distributor, offers comprehensive support for your Topping D70 Pro OCTO DAC.

• Money-Back Guarantee: 30-day money-back guarantee for any reason.
• Warranty: More than 12-month warranty on all quality defects.
• Price Matching: Supports 30-day price matching.

For any questions or support, please contact HIFI College at HIFICOLLEGE@gmail.com.

HIFI College is an authorized retailer for brands including KGUSS, TOPPING, GUSTARD, FX-AUDIO, and xDuoo, ensuring authenticity and reliable service.