Topping HS02 USB 2.0 High Performance Audio Isolator User Manual

Introduction

The Topping HS02 is a high-performance USB 2.0 audio isolator designed to eliminate ground loop interference and noise in audio systems. It provides a fully isolated signal path, ensuring a clean and high-fidelity audio experience. With its versatile input/output options and support for high-resolution audio formats, the HS02 is an essential component for audiophiles and professionals seeking pristine sound quality.

Key Features

• Fully Isolated Design: The HS02 features a fully isolated design that prevents new interference when an auxiliary power supply is used, while isolating the audio signal from ground loop interference. This effectively eliminates hum and noise.
• Dual Interface Switching: Equipped with two input interfaces (USB-B and Type-C) and two output interfaces (USB-A and Type-C), allowing flexible connection options via input and output switches.
• High-Speed Compatibility: Supports automatic identification of USB 2.0 transmission at low, full, and high speeds. Compatible with high-resolution audio formats such as PCM32bit/768kHz and DSD512 Native.
• Ultra-Low Latency: Achieves an ultra-low latency of only 0.073µs, suitable for demanding Hi-Fi and professional audio applications.
• Effective Noise Elimination: Capable of reducing noise introduced by ground loops by up to 50dB in real-world measurements.

Product Overview

Figure 1: Front and top view of the Topping HS02 USB Audio Isolator, highlighting its input ports and internal signal flow diagram.

Figure 2: Dimensions of the HS02 unit, measuring 3.8cm in height, 5.9cm in width, and 1.8cm in depth.

Figure 3: Detailed view of the HS02's input and output ports. It features USB-B (IN1) and Type-C (IN2) for input, and USB-A (OUT2) and Type-C (OUT1) for output, each with a dedicated selection switch.

Setup and Connection

The Topping HS02 is designed for easy integration into your audio setup. Follow these steps for proper connection:

1. Connect to Source: Use a USB cable to connect your audio source (e.g., PC, laptop) to one of the HS02's input ports (IN1 USB-B or IN2 Type-C). Select the active input using the input switch.
2. Connect to Audio Device: Connect your USB audio device (e.g., DAC, amplifier) to one of the HS02's output ports (OUT1 Type-C or OUT2 USB-A). Select the active output using the output switch.
3. Power Supply (if needed):
   • For USB devices powered via the USB port, the HS02 requires a 5V power supply to ensure sufficient power for reliable operation. Connect a 5V DC power supply to the auxiliary power input jack on the HS02.
   • For USB devices that are not USB-powered (e.g., devices with their own power adapter), an auxiliary 5V power supply for the HS02 is generally not required.
4. Optimal Connection: It is recommended to connect the HS02 directly to a USB root port on your PC rather than through a USB hub for optimal performance.

Figure 4: Connection diagrams for the HS02, illustrating setups with and without an external 5V power supply depending on the connected USB device's power requirements.

Figure 5: Example setup showing the HS02 connected between a laptop and an external audio device, illustrating a practical application.

Operating Instructions

Once connected, the HS02 operates automatically to provide signal isolation. No specific software or drivers are typically required for its basic function as an isolator.

• Input Selection: Use the physical input switch on the HS02 to toggle between the USB-B (IN1) and Type-C (IN2) input ports. Ensure the switch is set to the port connected to your source device.
• Output Selection: Use the physical output switch to toggle between the Type-C (OUT1) and USB-A (OUT2) output ports. Ensure the switch is set to the port connected to your audio device.
• LED Indicator: The LED indicator provides status feedback. Refer to the product diagram for its location.
• Automatic Speed Identification: The HS02 automatically detects and adapts to USB 2.0 transmission speeds (low, full, high speed) from your source.

Specifications

Figure 6: Comparison of HS02 specifications with a previous model (HS01), emphasizing the improvements in connectivity, isolation, and latency.

Troubleshooting

• No Audio Output:
  • Ensure both input and output switches on the HS02 are set to the correct, active ports.
  • Verify all USB cables are securely connected.
  • Check if your USB audio device requires external power and if the HS02 is receiving its auxiliary 5V power supply if needed.
  • Confirm that your computer's audio output is directed to the connected USB audio device.
• Persistent Hum or Noise:
  • While the HS02 is designed to eliminate ground loop noise, ensure all components in your audio chain are properly grounded.
  • Try connecting the HS02 directly to a different USB port on your computer, bypassing any USB hubs.
  • Ensure the auxiliary 5V power supply for the HS02 (if used) is stable and free of its own noise.
• Device Not Recognized:
  • Disconnect and reconnect the HS02 and your audio device.
  • Try a different USB cable.
  • Restart your computer.
  • Check your computer's Device Manager (Windows) or System Information (macOS) to see if the USB audio device is detected.

Figure 7: Noise spectrum analysis demonstrating the HS02's effectiveness in reducing noise, showing a clear improvement in signal quality.

Maintenance

The Topping HS02 requires minimal maintenance to ensure long-term performance.

• Cleaning: Use a soft, dry cloth to wipe the exterior of the device. Avoid using liquid cleaners or abrasive materials, as they may damage the finish or internal components.
• Storage: When not in use for extended periods, store the HS02 in a cool, dry place away from direct sunlight and extreme temperatures.
• Handling: Handle the device with care. Avoid dropping it or subjecting it to strong impacts.

Warranty and Support

For warranty information and technical support, please refer to the official Fanmusic or Topping website, or contact your authorized dealer. Keep your purchase receipt as proof of purchase for warranty claims.

For further assistance, you may visit the manufacturer's support page or contact their customer service directly.