GMS-272MU Parametric Equalizer

Four Bands with Up to 12dB Boost or Cut

The GMS-272MU Parametric Equalizer offers sound shaping ability similar to those found in studio mixing desks. Four channels of equalization spread across the audio band can shape the harmonics of an input to eliminate unwanted mid band harshness, emphasize the warmth of virtual or real sound sources or remove low or high frequency noise. A pair of these equalizers can assist in the mixdown and mastering process.

Technical Specifications

Frequency Bands

Number of Bands

Low Band
3 switch selected frequencies - 30, 50, 120 Hz

Low Mid Band
Continuously Variable - 100 Hz to 8K Hz

High Mid Band
Continuously Variable - 400 Hz to 22K Hz

High Band
3 switch selected frequencies - 14K, 16K, 20K Hz

Bandwidth (Q) Control
Variable - 3dB to 12dB per Octave on Low, Low Mid and High Mid bands
Switch selected 6dB or 12dB per Octave on High band

Boost/Cut Controls
Continuously variable - -12dB to +12dB

Low Band Shape
Switch selected Peak or Shelf

Typical Input Impedance
100K Ohms

Typical Output Impedance
1K Ohms (short circuit protection)

Module Power
+15 Volts 35 mA.
-15 Volts 35 mA.

Module Size
Panel height - 8.75 inches (222 mm)
Panel width - 4.25 inches (108 mm)
Depth (behind panel) 2.1 inches (53 mm)



We produce electronic synthesizer modules in the two most popular formats, MU (Moog compatible 5U) and EU (Eurorack compatible 3U). A wide range of voltage controlled modules including oscillators, amplifiers, mixers, envelope generators, special effects units, wave generators, filters, power systems and cases allow users complete freedom to configure any desired electronic music instrument.


Grove Audio builds microphones, preamplifiers, equalizers, compressors and other professional audio equipment for performance and studio use. We build units in popular formats such as 19 inch rack mount and 500 series 3U modules. We can also produce custom designs on request. Contact us for a consultation.


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Grove Audio has been manufacturing professional recording and modularized electronics for musicians and performers since 1995.