The Grompressor is an advanced compressor. Very useful for the bass player.

Level: Adjust the gain after the compression (make-up gain).

This control also is active if you go into one of the adjustable settings via the preset switch. Here you can adjust the blend level, input gain and activate the side-chain compression effect

Threshold: Adjust where the compression kicks in (0–70dB)

Attack: Adjust the attack time (1-200ms)

Release: Adjust the realese time (20-2000ms)

Ratio: Change the compression ratio from 1:1 – 1:20

Preset: Save up to 3 presets that can be loaded by clicking the right Footswitch

To SAVE a preset, navigate to the preset number you want to save to and HOLD the footswitch until it shows SAVED.

To LOAD a preset, navigate to the preset you want to load and push the footswitch fast.

To step through the presets, hold the footswitch ca 1s and it will change to the next preset and the color shows the number that is loaded:

Preset 1 : Green, preset 2: White, preset 3: Yellow


Push the preset to the RIGTH to adjust the blend-level, input gain (0-22.5db) and activate the Side-chain function. All parameters are controlled by the LEVEL knob.

Stereo input/output.



Input impedance: 500kOhm

Output impedance: 1kOhm

Max input: +1dBV(3.1Vp-p)

True bypass relays.


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