TOPPING PRO / E2x2OTG White Audio Interface

The E2x2 OTG is a rare 2-in/2-out audio interface with three USB ports. All you need is an OTG-compatible USB cable to connect directly to your smartphone or tablet, achieving lossless audio quality transmission. It's available in white.

■USB Audio Interface
■White

■Direct Connection to Smartphones
All you need is an OTG-compatible USB cable to connect directly to your smartphone or tablet and enjoy lossless audio quality transmission.
This enables the creation of a small-scale, high-quality recording and live streaming environment,
delivering outstanding quality regardless of the scene or location.

Digital Signal Transmission Distortion: -130dB
Dynamic Range: 138dB
*An auxiliary power supply is required for OTG connections.

■Sync with a PC to Optimize Smartphone Live Streaming
Connecting the E2x2 OTG to your PC allows for unique customization, such as the MIX function and applying effects using a DAW,
creating an emotional live experience with clear, crisp sound and beautiful vocals.

■Dual Device Connection for Live Streaming
In addition to a smartphone or tablet for streaming,
using a smartphone or other device to play background music, instrumentals, sound effects, and more expands the flexibility of your live streaming.
Dual device synchronization unleashes the originality of live streaming, and the diverse production and live feel allow for closer communication with listeners, creating endlessly engaging content.

■Equipped with ultra-linear microphone preamps
The E2x2 OTG is equipped with a proprietary ultra-linear microphone preamp module,
which delivers an extremely low equivalent input noise of -130.5dBu.
Even at maximum volume, the E2x2 OTG delivers extremely low background noise,
faithfully capturing every sound detail in your recordings.
This ultra-linear microphone preamp provides excellent audio signal transmission for clear, crisp sound.

■48V phantom power, condenser microphone compatibility
Equipped with a 48V phantom power switch, the E2x2 OTG allows you to use condenser microphones that require external power.
And, naturally, it also supports dynamic microphones, allowing for flexible recording.

■ Low-Noise LNRD Module
TOPPING's LNRD module provides stable power to the AD/DA chip,
ensuring stable chipset operation and enabling pure signal conversion.

Input DNR (ADC): 115dB
Output DNR (DAC): 115dB

■ Powerful Performance, Customized Headphone Amplifier
With a noise floor of just 0.9uVrms and an output impedance of 1Ω, the NFCA-LE (Nest Feedback Composite Amplifier) ​​headphone amplifier module
ensures pure monitoring with high-sensitivity headphones, free from distortion and noise.

■ Elegant Two-Color Lineup
The E2x2 OTG features two-stage gain adjustment, a maximum High Gain of +17dBu, and a powerful output of 580mW x 2 @ 32Ω.
This allows it to drive professional monitor headphones with impedances up to 600Ω.

■Zero-Latency Hardware Monitoring
The zero-latency hardware design allows for real-time monitoring of plug-in effects during recording and mixdown.

■Analog Volume Control Unlocks Dynamic Range
The line-out and headphone-out volume controls use analog potentiometers,
allowing for more precise and accurate volume control.

Line-out Dynamic Range: 127dB
Headphone-out Dynamic Range: 132dB

■Independent Mixer Control
Equipped with four 12-channel input mixers, the E2x2 OTG allows for easy adjustment and control of audio effects, enabling precise signal management.
Using the dedicated driver software ""TOPPING Professional Control Center,""
the eight DAW channels and six loopback channels are designed to meet a variety of creative needs for recording, mixing, and playback.

■Supports major operating systems and high-spec audio
The E2x2 OTG uses an XMOS USB chipset and is compatible with operating systems such as Windows, Mac, iOS, and Android.
Supports high-spec audio recording and playback from 44.1kHz/24bit to 192kHz/24bit, expanding the scope of your recording and music production.

■Three USB Type-C ports for flexible connections
The Type-C port is used for signal transmission and power supply to smartphones and PCs, ensuring easy connection.
When using the E2x2 OTG in a desktop environment or using 48V phantom power,
we recommend connecting an external power supply via the POWER port to ensure stability and prevent signal interference.

*We recommend connecting an external power supply when connecting to a smartphone.
*Please use an OTG-compliant cable to connect to the OTG port.

■ Optical digital output for even more creativity
The E2x2 OTG supports S/PDIF (optical digital output) and sampling rates from 44.1kHz to 192kHz/24bit.
The TOPPING Professional Control Center allows for flexible selection of audio content for the S/PDIF output.
The E2x2 OTG can be paired with DAC devices that support optical input, enabling a wider range of scenarios.


- USB A to C cable
- USB C to C cable
- 6.35mm to 3.5mm adapter
- Quick start guide


●Size: 18.7cm x 12.9cm x 5.0cm
●Weight: 530g
●Power input: USB Type-C port (5V/0.8A)
●Type-C: USB 2.0 (HS), OTG: USB 2.0 (FS)
●OTG technology: Digital ASRC
●Supported sampling rates: Type-C: 24-bit/44.1kHz-192kHz
●OTG: 16-bit-24-bit/48kHz
●S/PDIF: 24-bit/44.1kHz-24-bit/192kHz
●Software control: Yes (TOPPING Professional Control Center)
●DAW channels: 8 channels
●Loopback channels: 6 channels
●OS support: Mac/Windows / iOS / Android
● Simultaneous connection of two hosts: Supported
● Power switch: Yes (located on the back)