Mini Microphone Pre-amplifier

The MA-1 is a high quality 48 volt phantom power, compact, variegated applications microphone pre-amplifier. It is perfectly suited to internet conference systems, or computer based acoustical analysis systems .

This pre-amplifier features a XLR balanced Microphone input, output gain control with clip indicator, XLR balanced Line level output and a 3.5mm mini-jack Microphone output for connection to standard computer soundcard microphone input.

The panel is laid out clearly with Phantom Power LED indicator and switch. A corresponding LED that indicate signal content of microphone input. A switchable Low Frequency Filter can remove mic bumps and rumble.

The MA-1 mini microphone pre-amplifier is designed for use in application where exceptional audio performance is required.



  • Compact design.
  • Switchable +48 volt phantom power supply for condenser microphone with LED indicators.
  • Balanced Input Microphone circuitry.
  • Input signal indicator and Output level gain control with Clipping Indicator.
  • Switchable Low Frequency Filter to remove mic bumps and rumble.
  • External power supply for superior low-noise performance.
  • Use of highest quality components.



  Audio Specifications  
  Frequency Response -0.2/-1dB 20Hz~20kHz
    -6dB/-1dB 90Hz~20KHz (LFF Switch On)
  Input Impedance 10kΩ Balanced
  Maximum Input Level -3dBu (Refered to Min Gain)
    -34dBu (Refered to Max Gain)
  Maximum Output Level +26dBu XLR Balanced
    -24dBu Ø3.5mm Unbalanced
  Balanced Input, at 1kHz 70dB Typically
  Output Gain Adjustable Range +30dB to +60dB
  Output Impedance 200Ω (XLR Balanced)
    200Ω (3.5mm Mini-Jack Unbalanced)
  Output Noise (A-wtd) -80dB (Refered to Min Gain)
    -52dB (Refered to Max Gain)
  THD + Noise 0.03% @ 1kHz at +21dBm (Refered to Min Gain)
  Phantom Power 48V (Switchable)
  Input/Output/Power XLR Female Input,
    XLR Male Output,
    3.5mm Mini Jack Output,
    DC Power Jack (12~16 VDC)
  Switch  Phantom Switch,
    LFF Switch,
    Power Switch
  Power Requirement  12 VDC Adaptor
  Physical Specifications  
  Dimensions W41 × H85 × D108 (mm)
  Nett Weight 0.3kg