Topping Professional E2x2 OTG USB Audio Interface User Manual

1. Introducció

The Topping Professional E2x2 OTG is a high-performance USB audio interface designed for professional recording and mixing. It offers broad compatibility across various operating systems and features direct smartphone connectivity via OTG. Key components include an ultra-linear microphone preamplifier for minimal input noise, 48V phantom power for condenser microphones, and a high-fidelity headphone amplifier with extremely low noise. Its "Zero Latency" design ensures real-time monitoring for precise and delay-free recordings.

Figura 1.1: Front inclinat view of the Topping Professional E2x2 OTG USB Audio Interface, showcasinel seu disseny compacte i els seus controls principals.

2. Característiques clau

• High-Performance Interface: Ideal for professional recording and mixing, compatible with all major operating systems (Android, Linux, MacOS, Windows, iOS) and supports direct smartphone connection via OTG.
• Powerful Microphone Preampmés viu: Equipped with an ultra-linear microphone preamplifier that minimizes input noise, ensuring clean and precise recordings.
• Integrated Phantom Power: Features 48V phantom power, compatible with condenser microphones, enhancing versatility for various microphone types.
• High-Fidelity Headphone Ampmés viu: Integrates an NFCA-LE module for clean, detailed sound, even with high-sensitivity headphones, thanks to its extremely low noise level.
• Monitorització en temps real: The "Zero Latency" design allows for delay-free monitoring, ensuring a smooth and accurate recording experience.

Figure 2.1: Diagram illustrating the ultra-linear microphone preamp module, highlighting its advanced circuitry designed for minimal noise.

3. Guia de configuració

3.1. Contingut del paquet

Abans de començar, assegureu-vos que tots els elements estiguin presents al paquet:

• Topping Professional E2x2 OTG Audio Interface
• Cable USB-C a USB-A
• Cable USB-C a USB-C
• Manual d'usuari (aquest document)
• Power Adapter (if included, or ensure compatible power source)

3.2. Connexió a un ordinador

1. Connect one end of the provided USB-C cable to the Port USB-C on the rear of the E2x2 OTG.
2. Connect the other end of the USB cable to an available USB port on your computer (Windows, macOS, Linux).
3. Assegureu-vos el Interruptor d'alimentació on the rear panel is in the ON position. The PODER indicator on the front panel will illuminate.
4. Your computer should automatically detect the device. Install any necessary drivers if prompted (usually plug-and-play for most modern OS).

Figure 3.1: Rear panel connections of the E2x2 OTG, showing Power switch, Power input, USB port, OTG port, Optical output, 6.35mm TRS balanced output, and AUX output.

3.3. Connecting to a Smartphone/Tablet (OTG)

1. Connect one end of a compatible OTG USB cable to the Port OTG on the rear of the E2x2 OTG.
2. Connect the other end of the OTG cable to your smartphone or tablet.
3. El OTG indicator on the front panel will illuminate when a successful OTG connection is established.
4. Note: The audio interface may require auxiliary power supply when mobile phone OTG is directly connected. Ensure sufficient power is provided.

Figure 3.2: Direct mobile phone connection setup, demonstrating the use of an OTG USB cable for lossless sound quality transmission.

4. Instruccions de funcionament

4.1. S'ha acabat el panell frontalview

Figure 4.1: Front panel layout of the E2x2 OTG, detailing input jacks, gain controls, phantom power, instrument buttons, monitoring controls, and LED indicators.

• IN1 L / IN2 R (Mic/Instrument/Line Input): Combo XLR/TRS jacks for connecting microphones, instruments, or line-level devices.
• Botons de GUANY: Adjust the input gain for IN1 L and IN2 R.
• Botons de 48 V: Activate 48V phantom power for condenser microphones. The indicator light will illuminate when active.
• INST Buttons: Switch the input to instrument level for direct connection of guitars or basses.
• MON Buttons: Enable direct monitoring for each input channel.
• Indicadors de nivell LED: Display input and output signal levels, including CLIP indicators for overload.
• Botó MONITOR: Controls the overall output level for your monitor speakers or headphones.
• INPUT/PLAYBACK Mix Knob: Balances the direct input signal with the playback signal from your computer/device for monitoring.
• Sortida d'auriculars: 6.35mm TRS jack for connecting headphones.

4.2. Connexió de micròfons i instruments

• Connexió del micròfon: Connect your microphone to the XLR input of IN1 L or IN2 R. If using a condenser microphone, press the 48 V botó per subministrar alimentació phantom.
• Connexió de l'instrument: Connect your instrument (e.g., guitar, bass) to the 6.35mm TS plug of IN1 L or IN2 R. Press the corresponding INST botó.
• Connexió a nivell de línia: Connect line-level devices (e.g., synthesizers, external preamps) to the 6.35mm TRS plug of IN1 L or IN2 R. Ensure the INST button is disengaged.

Figure 4.2: Illustration of connecting a condenser microphone to the E2x2 OTG, highlighting the 48V phantom power capability.

4.3. Monitorització i reproducció

• Seguiment directe: Premeu el botó Dl button for the input channel you wish to monitor directly. This allows you to hear your input signal with zero latency.
• Monitorització d'auriculars: Connect your headphones to the 6.35mm headphone output jack. Adjust the MONITOR knob for overall headphone volume.
• Input/Playback Mix: Utilitza el INPUT/PLAYBACK knob to blend the direct input signal with the audio playback from your computer/device. Turn towards "INPUT" to hear more of your live input, and towards "PLAYBACK" to hear more of your computer's audio.

4.4. Live Streaming Applications

The E2x2 OTG is optimized for mobile phone live streaming, offering flexible connectivity options:

• Mobile Phone Live Stream with PC Synchronization: Connect the E2x2 OTG to your computer while simultaneously using it for mobile live streaming. Utilize your Digital Audio Workstation (DAW) on the PC to optimize voice synchronization and enhance audio quality for your live stream.
• Dual Mobile Phone Livestream: Easily connect a second phone to play accompaniment or audio material while one phone is actively live streaming. This expands your audience base and makes live stream interaction more dynamic.

Figure 4.3: Setup for optimizing mobile phone live stream with PC synchronization, showing the E2x2 OTG bridging a laptop and a smartphone.

Figure 4.4: Dual mobile phone livestream setup, illustrating how the E2x2 OTG connects two smartphones for enhanced live content creation.

5. Manteniment

Proper maintenance ensures the longevity and optimal performance of your Topping Professional E2x2 OTG.

• Neteja: Use a soft, dry cloth to clean the exterior of the device. Avoid using abrasive cleaners, solvents, or chemical sprays, as they may damage the finish or internal components.
• Emmagatzematge: Quan no l'utilitzeu durant períodes prolongats, guardeu el dispositiu en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
• Manipulació: Manipuleu el dispositiu amb cura. Eviteu deixar-lo caure ni sotmetre'l a impactes forts.
• Ventilació: Ensure proper ventilation around the device during operation to prevent overheating. Do not block any vents.

6. Solució De Problemes

If you encounter issues with your E2x2 OTG, refer to the following common troubleshooting steps:

• Sense energia:
  • Ensure the power cable is securely connected to both the device and a working power outlet.
  • Comproveu si el Interruptor d'alimentació on the rear panel is in the ON position.
  • If using OTG, ensure auxiliary power is supplied if required by your mobile device.
• Sense sortida de so:
  • Comproveu que el MONITOR el botó està girat cap amunt.
  • Check your computer's sound settings to ensure the E2x2 OTG is selected as the default playback device.
  • Ensure your headphones or monitor speakers are properly connected and functional.
  • Ajusteu el INPUT/PLAYBACK mix knob to ensure you are hearing the desired source.
• Sense senyal d'entrada:
  • Comproveu les connexions del cable del micròfon/instrument.
  • Assegureu-vos el GUANYA el botó de l'entrada respectiva està girat cap amunt.
  • If using a condenser microphone, ensure 48V phantom power is activated.
  • If connecting an instrument, ensure the INST es prem el botó.
  • Check the LED level indicators for activity. If no lights, check the source device.
• So distorsionat:
  • Reduce the input GUANYA to prevent clipping (indicated by the red CLIP LED).
  • Comproveu si hi ha cables danyats.
  • Assegurar sample rates and buffer sizes are correctly configured in your audio software.
• Dispositiu no reconegut per l'ordinador:
  • Proveu un port USB diferent a l'ordinador.
  • Prova amb un cable USB diferent.
  • Restart your computer and the E2x2 OTG.
  • Check your operating system's device manager for driver issues.

7. Especificacions

Detailed technical specifications for the Topping Professional E2x2 OTG USB Audio Interface:

Figure 7.1: Detailed comparison table highlighting the specifications and features of various Topping audio interface models, including the E2x2 OTG.

8. Informació de la garantia

Warranty information for the Topping Professional E2x2 OTG is typically provided by the retailer or manufacturer at the time of purchase. Please refer to your purchase documentation or the official TOPPING website for specific warranty terms and conditions. General return policy information from the seller indicates a 30-day refund/replacement period.

9. Atenció al client

For technical assistance, product inquiries, or support, please contact the retailer where you purchased the Topping Professional E2x2 OTG or visit the official TOPPING website for their customer support resources. Contact details are usually available on the product packaging or the manufacturer's official weblloc.

Seller: Zococity S.L

For further assistance, you may visit the seller's help page: Zococity S.L Seller Information