TOPPING E2X2 OTG - USB Audio Interface｜Professional OTG Live Streaming Interface with Optical Output
The TOPPING E2X2 OTG is a flagship professional USB audio interface designed specifically for content creators, music producers, and live streamers. It not only inherits Topping's high-fidelity technology in the audio field but also incorporates OTG functionality tailored for mobile device needs, allowing you to connect a computer and mobile phone simultaneously for seamless OTG mobile live streaming and Karaoke applications. Whether performing high-resolution recording in a professional studio or creating content outdoors using mobile devices, the E2X2 OTG delivers studio-grade pure sound quality.
This product features the exclusively developed NFCA-LE headphone amplifier module and an ultra-linear microphone preamp, boasting an astonishing -130.5dBu Equivalent Input Noise (EIN) to ensure the recording process is extremely quiet and rich in detail. Furthermore, the E2X2 OTG supports high-resolution audio up to 192kHz/24bit and is equipped with an independent high-power headphone amplifier with an output power of up to 580mW (32Ω), easily driving various high-impedance monitoring headphones. Combined with its unique optical output function and dedicated driver software, this 2-in/2-out audio interface is the optimal solution for pursuing ultimate sound quality and versatile connectivity.
Core Advantages and Application Scenarios
Dedicated OTG Port & Dual-Device Live Streaming
The biggest feature of the E2X2 OTG version lies in its powerful connectivity. Through the independent USB-C OTG interface, users can transmit audio signals directly to a mobile phone or tablet while using another USB interface to connect to a computer for accompaniment playback or monitoring. This function perfectly solves the problem of traditional audio interfaces struggling to handle computers and mobile phones simultaneously, maximizing the convenience and sound quality performance of mobile live streaming, Karaoke, and social media content creation.
Ultra-Linear Mic Preamp
To capture the most authentic sound, the E2X2 OTG is equipped with a flagship-grade ultra-linear microphone preamplifier. Its Equivalent Input Noise (EIN) is as low as -130.5dBu, meaning background noise remains virtually inaudible even when the gain is turned up. Whether recording vocals, acoustic instruments, or voiceovers, you can achieve clean, transparent, and detail-rich recording quality. Its extremely low noise floor makes it an ideal choice for professional recording studios.
NFCA-LE High-Performance Headphone Amplifier Module
Built with Topping's proud NFCA-LE headphone amplifier circuit, it provides powerful output power up to 580mW x 2 @ 32Ω. Featuring high/low two-stage gain switching and an output impedance as low as 1Ω, this ensures that both high-sensitivity in-ear monitors and high-impedance professional monitoring headphones can operate with extremely low distortion and zero noise (0.9uVrms), making the monitoring process precise and error-free.
LNRD Low Noise Reference Driver Power Technology
To ensure the purity of digital-to-analog conversion, the E2X2 OTG adopts a unique LNRD (Low Noise Reference Driver) circuit. This technology provides reference-grade stable power to the AD/DA chips, effectively filtering out noise interference from USB power supplies. This results in an ADC Total Harmonic Distortion plus Noise (THD+N) as low as <0.0003% and an input Dynamic Range (DNR) reaching 118dB, ensuring studio-grade signal purity.
Optical (S/PDIF) Output & Versatile Interfaces
In addition to standard XLR/TRS combo inputs and TRS balanced outputs, the E2X2 OTG is specially configured with an Optical output interface. Supporting digital signal output from 44.1kHz to 192kHz/24bit, it can conveniently connect to other DAC decoders, home theater systems, or digital audio equipment, significantly expanding the device's system integration capabilities.
Intuitive Mix Control & Zero-Latency Monitoring
Through the direct monitoring button on the hardware panel and the software control center (Topping Control Center), users can achieve zero-latency real-time monitoring. Independent analog volume potentiometers control the main output and headphone volume respectively; compared to traditional digital volume attenuation, analog control preserves a more complete dynamic range (Line Out: 127dB / Headphone: 132dB), providing more refined volume management and dynamic performance.
Detailed Features & Included Software
Technical Specifications (Tech Specs)
- Recording Resolution: 44.1kHz - 192kHz / 24bit
- Frequency Response: 20Hz - 40kHz (±0.2dB)
- Mic Preamp EIN (Equivalent Input Noise): -130.5dBu (A-weighted)
- Input Dynamic Range (ADC): 118dB
- Output Dynamic Range (DAC): 115dB
- Line Out Dynamic Range: 127dB
- Headphone Out Dynamic Range: 132dB
- ADC Total Harmonic Distortion (THD+N): <0.0003%
- Headphone Output Power: 580mW x 2 @ 32Ω / 380mW x 2 @ 64Ω / 27mW x 2 @ 300Ω
- Headphone Output Noise Floor: <0.9uVrms (Low Gain)
- Headphone Output Impedance: <1Ω
- Input Interfaces: 2 x XLR/TRS Combo (Mic/Line/Instrument)
- Output Interfaces: 2 x TRS (Balanced Line Out), 1 x 6.35mm Headphone Out, 1 x Optical Out
- USB Interfaces: 1 x USB-C (Data/Power), 1 x USB-C (OTG), 1 x USB-C (Aux Power)
- Phantom Power: +48V Independent Switch
- System Compatibility: Windows 10/11, macOS, iOS, Android
- Dimensions: (Please refer to the official manual for precise physical dimensions)
- Package Contents: E2X2 OTG Unit, USB-A to USB-C Cable, USB-C to USB-C Cable, Adapter, User Manual
THINK2 Warranty & Support
- Fast Shipping: In-stock items will be shipped within 24 business hours.
- Professional Technical Support: Our certified audio engineers provide consultation for installation, licensing, compatibility, and setup.
- Comprehensive Warranty & After-Sales Service: Includes both manufacturer warranty and THINK2 customer support.
※ Shipping times are calculated based on business days. Actual warranty follows the manufacturer’s policy. THINK2 provides integration and support assistance.
THINK2 Warranty & Return Policy
- With valid proof of purchase and product serial number, customers are entitled to manufacturer warranty and THINK2 after-sales service.
- DOA / Non-human defects: Within 7 days of purchase, after verification, customers may request return or replacement.
- Exclusions: Damages from misuse, unauthorized modification, consumable parts, natural disasters, or improper use beyond instructions.
- Application Process: Contact customer service during business hours for return instructions.
- Service Coverage: Taiwan region primarily; overseas based on logistics standards.
