Mini Microphone Amplifier (support internal batteries)

The MA-1B is a high quality 48 volt phantom power, compact, variegated applications microphone preamplifier. It is perfectly suited to internet conference systems, or computer based acoustical analysis systems. MA-1B can operate with internal batteries or an external power supply.

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-1B 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.
  • Switchable internal batteries or external power supply.
  • 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 35Hz~20kHz (-3dB/0dB)
  (Low Cut)  90Hz~20kHz (-3dB/0dB)
  Input Impedance 6kΩ Balanced
  Maximum Input Level -30dBm
  Nominal Output Level 0dB XLR Balanced
  (0dB=775mV)  -6dB Ø3.5mm Unbalanced
  THD + Noise <1%
  Output Gain Range 0dB~+60dB (Adjustable)
  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,
    LPF Switch,
    Power Switch
  Batteries (Not Included) Two 1.5V AA Zlkaline
  Accessories Furnished  12 VDC Adaptor
  Physical Specifications  
  Dimensions W41 × H85 × D157 (mm)
  Nett Weight 0.5kg