RDL EZ-MPA2 Dual Microphone Preamplifier - Stereo Output with Compressors

The EZ-MPA2 is a stereo microphone preamplifier with front-panel volume controls and audio level metering. A front-panel switch engages audio compressors to control overloads and clipping during high level audio bursts or peaks from the microphones. Dynamic or condenser microphones are both supported with rear-panel switchable phantom voltage. The line output is available on RCA or MINI jacks. Left and right channel LED VU metering facilitates easy level adjustment. The EZ-MPA2 is ideal to add microphone inputs to mixers and amplifiers with line inputs. It is used in houses of worship, restaurants, clubs, meeting rooms, educational facilities, conference rooms, studios and commercial sound systems.


  • Left and Right Balanced XLR Microphone Inputs
  • Switch-Selectable Phantom on Rear Panel
  • Unbalanced Output on MINI or RCA Jacks
  • Input and Output Connections on Rear Panel
  • Front-Panel Compressor Enable/Disable Switch
  • Audio Compressors Control Overloads
  • Front-Panel LEVEL Control for Each Channel
  • Dual-LED VU Meter for Each Channel


  • Optimized for Dynamic or Condenser Mics
  • Headroom Accomodates High Input Levels
  • Headroom Increases with Lower Gain Settings
  • Compressor Limits Clipping Over Wide Dynamic Range

Inputs (2):

1.2 kΩ balanced on XLR jack, mic-level, -11 dBu max.

Level controls (2):

Off to 50 dB gain for each input

Outputs (2):

-10 dBV nominal on RCA jacks or Mini jack, +16 dBV max. without compression, -4 dBV max. with 20 dB compression

Frequency Response:

80 Hz to 40 kHz (±1 dB, mic input, -6 dB at 20 Hz with integral high-pass filter)


< 0.1% (35 Hz to 20 kHz, -50 dBu input)

Compression :

20 dB range, switch-selectable


Below noise floor (1 kHz)


> 55 dB (20 to 20 kHz)


Dual-LED VU Meter for Left and Right, calibrated to -10 dBV output


Switch-selectable 24 V (IEC 61938: 2013)


< -65 dB (below -10 dBV output, -50 dBu input)

24 Vdc power supply current:

65 mA (idle), 90 mA (max.), 110 mA (max. with phantom)

Case dimensions:

5.75” (14.6 cm)W x 3” (7.6 cm)D

Mounting size:

1/3 rack width