AOSHIDA Topping D70 Pro OCTO Hi-Res DAC User Manual

1. Introduction

This manual provides comprehensive instructions for the AOSHIDA Topping D70 Pro OCTO Hi-Res DAC. Please read this manual thoroughly before operating the device to ensure proper usage and optimal performance. Keep this manual for future reference.

Key Features:

• Equipped with 8 Cirrus Logic CS43198 flagship DAC chips for exceptional audio fidelity.
• Supports PCM up to 768kHz/32bit and DSD512 audio decoding via USB.
• Features Bluetooth 5.1 connectivity with support for LDAC, aptX-Adaptive, aptX HD, aptX, AAC, and SBC codecs.
• Full-color display with three touch buttons for an intuitive user interface, including playback information, FFT, and VU meter.
• Versatile output options: RCA single-ended and XLR balanced outputs, with switchable output modes.
• Low THD+N (<0.00007%) and high SNR (134dB) for pristine sound reproduction.

2. Package Contents

Verify that all items listed below are present in your package:

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

3. Setup

3.1 Connecting the Device

1. Power Connection: Connect the supplied AC power cable to the D70 Pro OCTO and a suitable power outlet.
2. USB Connection: For computer audio, connect the USB cable from your computer to the USB input on the D70 Pro OCTO.
3. Audio Output: Connect your amplifier or active speakers to the D70 Pro OCTO using either RCA (single-ended) or XLR (balanced) cables.
4. Bluetooth Antenna: Screw the Bluetooth antenna onto the designated connector on the rear panel for optimal wireless performance.

3.2 Driver Installation (Windows Only)

For Windows operating systems, especially when using ASIO applications, driver installation may be required. The D70 Pro OCTO utilizes the XMOS XU316 solution. For other operating systems like MAC, Linux, iOS, and Android, the device is typically driver-free.

3.3 Bluetooth Pairing

To pair a Bluetooth device:

1. Ensure the Bluetooth function is enabled in the D70 Pro OCTO's setup menu.
2. On your Bluetooth device (e.g., smartphone), search for available devices and select "D70 Pro OCTO".
3. The D70 Pro OCTO supports LDAC, aptX-Adaptive, aptX HD, aptX, AAC, and SBC for high-quality wireless audio transmission.

4. Operating Instructions

4.1 Power On/Off

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

4.2 User Interface and Navigation

The D70 Pro OCTO features a full-color screen and three touch buttons for navigation. You can toggle between different display modes, including playback information, FFT (Fast Fourier Transform) spectrum analysis, and VU (Volume Unit) meters.

4.3 Input Selection

Use the input selection button on the front panel or remote control to cycle through available inputs: USB, AES, Bluetooth, Optical, and Coaxial.

4.4 Output Mode Selection

The D70 Pro OCTO allows switching between RCA single-ended output, XLR balanced output, or enabling both simultaneously. This can be adjusted via the setup menu to suit your connected equipment.

4.5 Volume Control

Adjust the volume using the rotary knob on the front panel or the volume buttons on the remote control. Note that in DAC mode, the volume is fixed at maximum; switch to PRE mode if adjustable volume is desired.

5. Specifications

Audio Performance (Line Out/USB In@96kHz):

• THD+N (A-wt): RCA: <0.00008% @1kHz; XLR: <0.00007% @1kHz
• THD @90kBw (No-wt): RCA: <0.0004% @20-20kHz; XLR: <0.0002% @20-20kHz
• SNR (A-wt): RCA: 128dB @1kHz; XLR: 134dB @1kHz
• Dynamic Range (A-wt): RCA: 128dB @1kHz; XLR: 134dB @1kHz
• Frequency Response: RCA: 20Hz-20kHz (±0.05dB), 20Hz-40kHz (±0.2dB); XLR: 20Hz-20kHz (±0.05dB), 20Hz-40kHz (±0.2dB)
• Output Level: RCA: 2.1Vrms (4V Mode), 2.6Vrms (5V Mode); XLR: 4.2Vrms (4V Mode), 5.2Vrms (5V Mode)
• Noise (A-wt): RCA: <1.0uVrms; XLR: <1.0uVrms
• Channel Crosstalk: RCA: -124dB @1kHz; XLR: -149dB @1kHz
• Channel Balance: RCA: 0.3dB; XLR: 0.3dB
• Output Impedance: RCA: 50Ω; XLR: 100Ω

General Specifications:

• Product Dimensions: 22.2 x 17.6 x 4.8 cm (8.74"L x 6.93"W)
• Item Weight: 3.39 pounds
• Interface Type: USB, AES, Bluetooth, Optical, Coaxial
• Number of Channels: 2
• DAC Chips: 8 x Cirrus Logic CS43198
• USB Input Support: PCM768kHz/32bit, DSD512
• Bluetooth Version: 5.1
• Bluetooth Codecs: LDAC, aptX-Adaptive, aptX HD, aptX, AAC, SBC

6. Maintenance

To ensure the longevity and optimal performance of your D70 Pro OCTO, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the finish.
• Ventilation: Ensure the unit has adequate ventilation. Do not block the ventilation openings.
• Environment: Operate the device in a clean, dry environment, away from direct sunlight, excessive heat, humidity, and dust.
• Power Off When Not in Use: If the unit will not be used for an extended period, disconnect it from the power supply.

7. Troubleshooting

If you encounter issues with your D70 Pro OCTO, refer to the following common problems and solutions. For persistent issues, please contact customer support.

Common Issues and Solutions:

• Can't be turned on:
  • Check the power connection.
  • Check if the rear panel power switch is in the ON position.
  • Try with another power cable.
  • Try with another power outlet.
• No sound output:
  • Insert connection cables all the way in.
  • Check the volume of all devices and whether they are muted.
  • For Bluetooth input: If volume is too low on phone, adjust phone volume.
  • For USB input: If volume is too low on PC, check and adjust computer system volume, music player volume, and driver volume. Select the default output device of your music player or computer as this unit.
• Noisy playback:
  • Try with other songs.
  • Ensure the specifications of songs are supported by this unit.
  • If noise appears only when playing DSD files, check and adjust the computer system volume, music player volume, and driver volume to the maximum.
  • Check if the problem is with the source, downstream equipment, and cables.
  • If the noise disappears after unplugging the USB cable, it may be interference from the source. Consider adding a USB isolation device between this unit and the source.
• One channel with noise / no output:
  • Check if the problem is with the source, downstream equipment, and cables.
  • Try swapping the left and right channel connections and test with another source.
• Channel imbalance:
  • Set to C (Balance) in [Setup Menu - Advance - Channel balance].
  • Check to see if the problem is with the source, downstream equipment, and cables. You can try swapping the left and right channel connections and try with another source.
• Cannot pair Bluetooth:
  • Enable Bluetooth function in the setup menu first.
  • The unit may already be connected to another Bluetooth device. Press and hold the headphone button on the remote control to let this unit enter pairing mode.
  • Bring the Bluetooth device near to this unit.
  • Turn the power of the unit off and on again, and then try again.
• Bluetooth audio cut off:
  • Bring the Bluetooth device near to this unit.
  • Remove obstructions between the Bluetooth device and this unit.
  • To prevent electromagnetic interference, locate this unit away from microwave ovens, wireless LAN devices, and other Bluetooth devices.
  • Reconnect the Bluetooth device.
• Connected USB device not recognized:
  • USB cable not connected properly. Please check or change the cable.
  • Try with another USB port.
  • Driver problem. Try to reinstall the driver.
  • May be caused by the PC. Check or try with another PC.
  • Some phones require OTG function to be enabled first.
• Remote control not responding:
  • Enable remote control function in the setup menu first.
  • Try to insert two fresh AAA batteries.
  • Aim at the remote control receiver.
  • Bring the remote control close to the device.
  • Use your Android phone's camera to look at the transmitter at the top of the remote; if it doesn't blink when you press the remote button, the remote is defective.
  • If you have more than one Topping device, check that you are using the correct remote control.
• Can't adjust unit's volume:
  • Please check if DAC mode was set in [Setup Menu - Advanced-DAC mode]. In DAC mode, the volume is not adjustable and is the maximum value, while in PRE mode the volume can be adjusted. Set it to PRE mode if you need to adjust the volume.
• Sample rate displayed does not match music file:
  • The choice of music player app, the setting of music player, and the setting of computer/phone will all have an impact on the sampling rate.
  • The sampling rate displayed by this unit is the sampling rate of the input signal, and it will not change the sampling rate by itself.
  • If the music player can be set to exclusive mode, the audio signal will not be resampled by the computer/phone, so the sampling rate of the output signal is the sampling rate of the original file, and the sampling rate displayed by this unit is also the sampling rate of the original file.
  • Because some players can't be set to exclusive mode, the audio signal will be resampled by the computer/phone and then output. So this unit will always display the sampling rate set by the computer/phone.
  • We recommend using Audirvana player on MAC OS and Foobar on Windows OS.
• DAC abnormal, DIR abnormal, PN voltage abnormal, 5V voltage abnormal, FFT module abnormal:
  • Disconnect other devices and reboot. If the problem still persists, your unit may be defective. Please contact the store where you purchased it.
• Firmware issues (File size large, Firmware damage, Topping other firmware, Unknown file, Update failed, No firmware):
  • Please re-flash the correct firmware.
  • For 'File size large', try to reboot the computer or use another computer.

8. Warranty and Support

8.1 Warranty Information

This product is covered by a limited manufacturer's warranty. Please refer to the warranty card included in your package or contact your retailer for specific warranty terms and conditions. Keep your proof of purchase for warranty claims.

8.2 Customer Support

For any questions, technical assistance, or support regarding your AOSHIDA Topping D70 Pro OCTO, please contact AOSHIDA customer service. They are available to guide you through any issues you may encounter during use.

Contact information can typically be found on the AOSHIDA official website or through your authorized retailer.