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Keeley HYDRA User Manual

Keeley HYDRA
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INSTRUCTION MANUAL
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Keeley HYDRA Specifications

General IconGeneral
Stereo Input/OutputYes
Expression Pedal InputYes
Power Supply9V DC, center negative
BypassTrue Bypass
Weight1 lb
TypeStereo Reverb and Tremolo
Reverb ModesSpring, Plate
Tremolo ModesHarmonic, Vibrato, Sine
Presets3

Summary

Primary Controls

Rate Control

Sets the rate of the Tremolo, turning left for slower speeds and right for faster.

Depth Control

Sets the maximum volume reduction for the Tremolo effect.

Dwell Control

Sets the length of the Reverb trail, turning left for less and right for more.

Color Control

Sets the tone of the Reverb and grants access to alternative settings and presets.

Mixer Control

Sets the level of the Reverb, turning left for lower volume and right for higher.

Reverb Type Toggle Switch

Selects between Spring, Plate, and Room Reverb types.

Secondary Controls

Footswitch Controls

Tremolo Footswitch

Single tap for on/off, hold for Tap Mode. Controls Tremolo bypass and tempo.

Tap Tempo Mode

Infinite Hold Feature

Trails or True Bypass

Creating and Saving Presets

Preset Select Mode

Enter Preset Select Mode by double tapping the TREMOLO switch or tapping the COLOR knob.

Saving Changes to a Preset

Save parameter changes to a preset by entering select mode and holding the TREMOLO switch.

Expression Pedal Use

Factory Reset

Technical Specifications

Hydra Quick Start Guide

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