Keeley Electronics Hydra – Reverb & Tremolo

The Keeley Hydra puts high-fidelity reverb and tremolo in one stereo pedal, giving your guitar, bass, or synth signal space and depth.

It’s built as a natural companion to the Eccos delay and looper, sharing the same feature-rich philosophy – pack adeep set of controls into a compact, pedalboard-friendly enclosure.

There are three types of reverb…

• Spring
• Plate
• Room

… and three types of tremolo

• Harmonic
• Vibrato
• Sine Wave

The order of the two effects can be swapped, and the Alt Controls give you access to deeper tone-shaping parameters for both the reverb and tremolo sides.

An Infinite Hold function lets you freeze a reverb trails and three presets can are available. Reverb trails engage on the fly now too!

The Hydra is built with pro rigs in mind. It works with remote switching systems, and offers both a TRS expression pedal input and an external tap-tempo input.

Controls

Primary controls

• RATE – Sets the rate of the Tremolo. Turn left for slower speeds, right for faster.
• DEPTH – Sets the maximum amount of volume reduction for the Tremolo.
• COLOR – Sets the tone of the Reverb. Pressing this control grants access to alternative settings and presets.
• DWELL – Sets the length of the Reverb trail. Turn left for less, right for more.
• MIXER – Sets the level of the Reverb. Turn left for a lower Reverb volume, right for higher Reverb volume.
• TOGGLE SWITCH – Selects between Spring, Plate and Room Reverb types.

Secondary Controls

• COLOR – Press and hold the COLOR knob while manipulating the other controls to change the settings
  marked in dark grey on the Hydra.
• TREM SYNC – Sets the stereo output of the Tremolo for either panning, synced, or wet/dry. CCW of noon is stereo panning where the signal will alternate between the two outputs. At noon both outputs will be in sync, pulsing at the same time. CW of noon will run the dry signal through the Stereo Out jack and Trem through the Mono Out jack.
• TREM LEVEL – Controls the output volume of the Tremolo. At full CW there is a +6db boost to compensate for the perceived volume drop inherent in Tremolo.
• WET/DRY – Sets the stereo output of the Reverb for either stereo Reverb or a wet/dry setup. CCW of noon is stereo Reverb while CW of noon is the dry signal only on the Stereo Out and Reverb on the Mono Out.
• REVERB MODIFIER – Modifies the Reverb depending on the mode selected.
• On Spring this will control the spring age, being bouncier and more pronounced echoes with the control full CW and more diffused and smooth at full CCW. On Plate this sets the amount of shimmer introduced into the Reverb.
• Full CCW is no shimmer with full CW giving a large cascade of octave up. On Room this controls the room size, going from a small closet at full CCW to a large cavern at full CW.
• TOGGLE SWITCH – Selects between Sine, Harmonic, and Vibrato Tremolo

Features

Featuring gorgeous Spring, Plate and Room reverb algorithms, plus a tap-tempo enabled Harmonic, Vibrato and Sine Wave Tremolo – are all accessible at the press of a button – Hydra will add space and dimension to any instrument.

To alter the response of this killer Tremolo/Reverb combination, the effects order can be easily changed.

In addition, the Hydra’s Alt Controls let you access in-depth parameters to shape the character of both sound engines. Plus, Hydra even offers an Infinite Reverb Trail!

With expression control, remote bypass, 3 presets, analog-dry-through, kill-dry and a ridiculously low power-draw, this pedal is sure to add immense flexibility and gorgeous sounds to any rig.

• Stereo high-fidelity Reverb and Tremolo effect pedal
• 3 memory presets, subdivisions, trails, infinite hold reverb trail
• 3 reverb (Spring, Plate and Room) and 3 tremolo modes (Sine, Harmonic, Vibrato)
• Huge array of tone and time-based controls with the Alt Hold feature
• Bypass and Tap Tempo on-board or remotely with any style pedal-switcher
• Expression pedal assignment over any parameter and in any direction •
• Pro Rig designed, remote control thru 1/4″ jacks for live use with pedal switcher systems
• 100% analog dry signal, audiophile designed input to output
•  Stereo True-Bypass/Trails, switchable on the fly

Powered by a regular 9V DC PSU centre negative 2.1 mm. Requires 115 mA current.

See the Keeley Hydra In Action

FAQs