Maselec MMA-4

The MMA-4 four channel microphone preamplifier is the latest in the Prism Sound Maselec Master series of analogue signal processors

The MMA-4 has been designed as an audiophile pre-amplifier with a minimum of electronics in the signal path. Design objectives included consistently good sound over the whole range of gain settings, a high level of transparency and ultra-low noise and distortion.

The MMA-4 was developed in association with engineer/producer Leif Mases. Leif's work with a diverse range of artists including Abba, Led Zeppelin and Black Sabbath is demonstrated by the MMA-4's design with the engineer in mind.



  • High quality pre-amplification for audiophile-grade recording
  • Precision stepped controls for repeatability
  • Easy-to-read PPM bargraph meter
  • Switchable high current +48V phantom power
  • Switchable phase reversal
  • Cut switch
  • Flexible and easy-to-use in a wide range of applications
  • Ideal front end for AD-2 stereo A/D converter


  • Low noise
  • Low distortion
  • Extended frequency response
  • Electronically balanced XLR analogue input and output
  • Gain switchable from 0dB to +60dB in 3dB steps


Specifications quoted are to AES17-1991 (ANSI S4.51-1991)

  • Maximum input amplitude : >+26dBu
  • Maximum output amplitude (load > 600R): >+28dBu
  • Frequency response (+0dB/-3dB): < 1Hz,  > 200kHz
  • Noise (E.I.N., 20Hz-20kHz):
          Gain >57dB, 150R source:    <-129dBu
          Gain>30dB, 150R source:    <-126dBu
          Gain>48dB, 0R source:    <-134dBu
          Gain>30dB, 0R source:    <-128dBu
  • Distortion (1kHz, 0-60dB gain): <0.0006%
  • CMRR (50Hz-20kHz, 60dB gain): <115dB