UnderTone Audio MPEQ-1

The UnderToneAudio MPEQ-1 is the amalgamation of the UTA EQ and UTA's new custom mic pre. You can use the equalizer and the mic pre separately or as a complete channel strip.

The mic pre has a custom input transformer and a carefully chosen output transformer. Both are optimized to accentuate the most flattering sonic qualities inherent in audio transformers. The unique mic pre design makes both of the transformers bypass-able. This offers users a choice between the detailed clarity of a Class-A transformer-less design or the vintage musicality of a dual transformer mic preamp.


  • -10 to -60 dB boost range (in stepped 5 dB increments)
  • Switchable 20 dB pad
  • Instrument DI
  • Front panel XLR–1/4" (DI) combo input
  • Phase reverse switch
  • + 48 V phantom power
  • +/- 10 dB trim knob
  • Bypass-able input and output transformers
  • Ability to use mic-pre and UTA EQ on seperate signals.
  • Inputs/Outputs (all XLR):
    • Mic-pre Input
    • Mic-pre direct Line Output
    • Line Input
    • EQ Line Output - w/ output transformer
    • EQ Line Output - w/o output transformer


Input Impedance:

  • Mic In transformerless: 2K ohms
  • MIc In 200 Ω: 2K ohms
  • MIc In 50 Ω: 500 ohms
  • Line In: Greater than 10K

Output Impedance:

  • Mic Out: 47 ohms
  • Main Out Transformerless: 47 ohms
  • Main Out with Transformer: 120 ohms

Frequencey Response:

  • Mic Preamp: 10 Hz - 80 kHz +0 /-1 dB
  • Line In/Out: 10 Hz - 50 kHz +0 /-1 dB

Noise Floor:

  • Mic Preamp: -128 dBu (20 Hz - 20 kHz)
  • Line Level Circuit: -91.5 dBu (20 Hz - 20 kHz)

Max Level Before Clip:

  • Mic Preamp: +27 dBu (or better)
  • Line Level Circuit: +27 dBu (or better)


  • Mic Preamp: .003% at +27 dBu
  • Line Level Circuit: .015% at +27 dBu


  • Front to Back: 12.25” (with heat sinks and knobs: 14”)
  • Left to Right: 17.25” (with rack ears: 19”)

Weight: 10 lbs

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
  • UnderTone Audio MPEQ-1

Vintage King Audio

Troy, MI, United States
Joined Reverb:2015

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