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

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

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(limiter)

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

To SAVE a preset, press the Attack/SAVE knob until the screen shows SAVED.

To LOAD a preset,  push the Preset footswitch fast and it will load next preset. Hold the switch, and you will load the previous.

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


Push the MENU knob to adjust the blend-level, input gain (0-22.5db) , Side-chain functions, Noise gate and the Tilt Equalizer. All parameters are controlled by the Menu knob.

Stereo input/output.



Input impedance: 500kOhm

Output impedance: 1kOhm

32bit floating point architecture.

Max input: +6dBV(6Vp-p)

True bypass relays or buffered bypass. You can change this setting by holding both footswitches during startup and adjust with the toggle switches.


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