SX-M2 Mic Premp

The most critical part of any sound recording system is the microphone preamplifier. Considerable effort was therefore invested in this element with the development of the Sonosax SX-S mixer. This laid down the foundation for this product's success and the same philosophy has since been implemented in the other Sonosax products. The advent of the DAT, MiniDisc, DV, miniDV and Betacam formats has created a need for mic preamplifiers of equally high standards. As most of these applications do not demand any on site mixing, Sonosax now offers its well-proved technology in a versatile dual channel package. The Sonosax SX-M2 operates with two 9volt batteries, or with NiCd accumulators.



  • High quality professional stereo Mic / Line amplifier
  • Ideal complement for DAT, MiniDisc, DV, miniDV recorders and Betacam
  • 48 volts Mic Power, battery operated
SX-M2 front view
SX-M2 front view
SX-M2 right view
SX-M2 right view
SX-M2 left view
SX-M2 left view


Type balanced transformerless, XLR connectors
Impedance 5 kOhms, 20 Hz to 20 kHz
Gain 76 dB to 20 dB (high), 40 dB to 6 dB (lo), 0 dB (center)
Lo cut filter 18 dB/oct, -3 dB at 70 Hz
Overload indicator 6 dB before clipping level
Mic power phantom 48V
Balanced floating transformerless XLR, nominal level: +6 dBu,
max +20 dBu 600 Ohms
Unbalanced 3.5mm mini-jack stereo, nominal level: 0dBu, max +14 dBu
Frequency response ±0.5 dB, 20 Hz to 20 kHz
Crosstalk better than 75 dB, 20 Hz to 20 kHz
THD less than 0.01%, 20 Hz to 20 kHz at +6 dBu, less than 0.03% at +20 dBu
Noise 76 dB gain better than -129.2 dBu, 20 Hz to 20 kHz, 150 Ohms source
Noise 40 dB gain better than -126 dBu, 20 Hz to 20 kHz, 150 Ohms source
Batteries 2 x 9V alkalines (UCAR 6LR61 or equivalent), or Ni-Cd rechargeable (UCAR RC22 or equivalent)
External 12V DC to 24V DC, minimum 30mA, maximum 80mA
Autonomy 6 to 10 hours with alkaline batteries, 1,5 to 3 hours with NiCd
Indicator low batteries at 14V. Autonomy: minimum 2 hours with alkaline batteries, and minimum 10 minutes with NiCd
Dimensions 5.75" x 3.4" x 1.6" (146 x 85 x 40mm), 0.95lbs (435g) with batteries
Price $1285


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Most recent revision January 5, 2012