GMS-715 4 Channel Stereo Mixer

Voltage controlled level, pan and master

This module contains 4 high quality voltage controlled amplifiers feeding four voltage controlled panning circuits, the outputs of which can be assigned to an internal stereo mixer. The outputs of the two mixer channels feed two master voltage controlled amplifiers. Each of the input channels can be set for logarithmic or linear control in response to the input voltage control or front panel gain control. Because of this, either audio or control voltages can be processed or mixed. The pan voltage input has an attenuverter control to set the level or polarity of the pan control signal.

Six illuminated alternating action pushbuttons in each channel control the LOG/LIN mode, channel bus assignment, channel mute, channel solo, and channel cue functions.


Technical Specifications

Voltage Controlled Amplifiers


Channel Gain Control
Front panel control
VC input - -5 V. to +5 V.

Output Gain Control Range
-70dB - +6dB

Typical Input Impedance
100K Ohms

Typical Panel Output Impedance
1K Ohms (short circuit protection)

Voltage Controlled Panning

Voltage Range - Left to Right
-5 V. to +5 V.

Pan Control
Front panel control
VC Pan input

VC Pan Attenuverter Gain
-100% to *100%

Stereo Mixer

L/R Assignment
Solo Button
Mute Button

Master Voltage Controlled Output Amps
Voltage range - 0 V. to +5 V.

Typical Output Impedance
1K Ohms (short circuit protected)

Cue Bus

Rear panel mono output to
external cue amplifier

Module Power
+15 Volts 150 mA.
-15 Volts 170 mA.
+5 Volts 200 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.


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.