Amplifiers & Mixers

3U 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.

GMS-712EU Dual Voltage Controlled Amplifier

The GMS-712EU Dual Log/Lin Voltage Controlled Amplifier contains two high quality VCA devices in a 6HP panel. Each amplifier can be set for a linear or logarithmic response to the input control voltage.  


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.