Ultra portable dual domain preamplifier


Key Features

  • Two mic/line analog inputs with 135dB dynamic range
  • Independent line and phones outputs
  • AES42/AES3 input, AES3 output
  • Two channels in/out USB audio 2.0
  • Powered by removable Li-ion battery, Hirose or USB with intelligent energy management

Inputs / Outputs

  • 2x mic/line inputs on TA3, electronically balanced, with phase reversal, 48V phantom, LF cut and level control
  • 1x AES3/AES42 on TA3, transformer balanced input with phase reversal and level control
  • 1x line output on TA3, 2 channels analog unbalanced
  • 1x AES3 output on TA3, 2 channels transformer balanced with ASRC (48/96/192k)
  • 1x USB audio 2 channels input/output on micro USB type C connector
  • independent line/headphones stereo output on mini-jack


  • 135 dB (A-weighted) overall dynamic range
  • THD < 0.001%
  • 90 kHz overall frequency response @192kHz
  • 24-bit 48/96/192kHz


  • external DC 9-18V on Hirose 4-pin
  • external DC 5V on micro USB
  • removable 18650 lithium-ion battery cell, charged with external DC input
  • intelligent energy management
  • About 4.5 hours run-time with a full charged 11.5Wh battery and two Schoeps 48V microphones

User Interface

  • 128×64 monochrome OLED display
  • two rotary encoders for gain control
  • 2 or 4 channels peak meters
  • intuitive menu navigation


  • Machined aluminum housing
  • overall dimension: 74 x 28 x 130 mm (2.9’’ x 1.1’’ x 5.1’’)
  • weight 336g (0.74lbs) with battery
  • mounting holes on both sides

SX-M2D2 Sell Sheet

USB Audio Interface

Most recent Apple iPhone, iPad and Android devices work with the SX-M2D2.  The following list resumes some suggested apps. Please note that since these apps come from third party vendors, no support is provided for them.

  • Audio Evolution (iOS, Android)
  • TwistedWave Audio Editor (iOS)
  • Apogee Metarecorder (iOS)
  • Field Recorder (Android)

Apple iOS cable compatibility: the Apple USB-C to Lightning cable doesn’t work with the SX-M2D2. Supported cables are the Lightning to USB Camera or the Lightning to USB 3 Camera adapters.

Apple OSX version 10.6.4 and above, Windows 10 version 1703 and above and all (modern) Linux distributions natively supports USB Audio Class 2.0, no driver install is required.