GMS-1380MU Digital Delay

Up to four seconds of audio delay with effects

The GMS-1380MU Digital Delay can provide delay times of up to 4 seconds for a monoaural input or up to 2 seconds per channel for stereo inputs. Samples of 16 bits per channel and 44.1 kHz provide low noise performance and high quality audio throughput. Internal selection of mode through the OLED data display includes simple delay, slap-back delay, ping-pong delay, reverberation, chorus, and flanger effects.

Panel controls include input level, feedback level and dry/wet mix level. There is an LED to indicate when the maximum input level has been reached.


Technical Specifications

Delay Time
Monaural - 1 msec. - 4 secs.
Stereo (per chan.) 1.0 msec. - 2 secs.

Operational Modes

Output Gain Control
-10dB or +4dB jumper select

Control Voltage Range
-5 V to +5 V

Internal LFO
0.1 - 360 BPM

Typical Input Impedance
100K Ohms

Typical Output Impedance
1K Ohms (short circuit protection)

Module Power
+15 Volts 20 mA.
-15 Volts 20 mA.
+5 Volts 120 mA.

Module Size
Panel height - 8.75 inches (222 mm)
Panel width - 2.125 inches (54 mm)
Depth (behind panel) 2.125 inches (54 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.