Amplifiers & Mixers

5U Synthesizer Modules

This section contains modules designed to combine audio or control signals or to vary the gain of an incoming audio or control signal under voltage control. Some of the modules in this section also provide the ability to pan a signal between two outputs to allow creation of a stereo effect from a monaural input. 

GMS-712MU Dual Voltage Controlled Amplifiers

The GMS-712MU Dual Log/Lin Voltage Controlled Amplifier contains two high quality VCA devices in a 1MU panel. Each amplifier can be set to have a linear or logarithmic response to the input control voltage.  

GMS-714 Quad Voltage Controlled Amplifiers

The GMS-714 Quad Voltage Controlled Amplifier/Gate contains four high quality VCA devices in a 1MU panel. Each amplifier can produce a change in amplifer gain from infinite attenuation to a gain factor of 1 or more with linear or logarithmic control response.

GMS-715 Four Channel Voltage Controlled Mixer

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GMS-725 Mixer/Processor

The GMS-725 4 channel mixer/processor module combines a 4 input mixer that has a variable gain control and offset control with a second amplifier with a single input, gain, and offset controls in a 2MU module.

GMS-726 4 Input Mixer

The GMS-726 4 Channel Mixer module can be used for mixing audio or control voltage signals. The module produces simultaneous outputs that are in phase and 180 degrees out of phase.

GMS-1310MU Compressor/

The flexible GMS-1310MU Compressor/Limiter module is a feed-forward compressor that uses a low distortion Blackmer gain cell for level control driven by a true RMS level detection circuit.


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.


You can explore all of our products, download spec sheets, and purchase our products in the Grove Audio Synth Store. You can also learn about our periodic specials and new product introductions. Click the button below to go directly to the store.

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