Keeley Electronics Hydra Stereo Reverb & Tremolo Pedal

£269.00

Also available on — Andertons, Amazon, eBay & Reverb

The Keeley Guitar Pedals always come out on top. This is New is in stock and ready to post out to you, with fast, reliable delivery straight to your door. For more New Guitar Pedals options, read on for full specifications, demos, and secure online ordering. The Keeley Hydra combines two tone-enriching effects in one simple, pedalboard-friendly package. This feature-packed sonic workstation offers a range of high-fidelity reverb and tremolo algorithms that can add both space and dimension to your guitar, bass or synth sounds.Following in the footsteps of their acclaimed Eccos 2-in-1 delay/looper, Keeley’s versatile Hydra pedal is the perfect companion for vintage aficionados who adore old-school ambient…

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Description

The Keeley Guitar Pedals always come out on top. This is New is in stock and ready to post out to you, with fast, reliable delivery straight to your door. For more New Guitar Pedals options, read on for full specifications, demos, and secure online ordering.

The Keeley Hydra combines two tone-enriching effects in one simple, pedalboard-friendly package. This feature-packed sonic workstation offers a range of high-fidelity reverb and tremolo algorithms that can add both space and dimension to your guitar, bass or synth sounds.

Following in the footsteps of their acclaimed Eccos 2-in-1 delay/looper, Keeley’s versatile Hydra pedal is the perfect companion for vintage aficionados who adore old-school ambient reverbs mixed together with traditional tremolo tones.

2 Effects in 1 Pedal

Hydra is split into two sides to reflect each of its sound engines, with independent Reverb and Tremolo footswitches making it easy to engage each of these effects or use them simultaneously. To alter the response of this killer tremolo/reverb combination, you can change their order to suit your specific tonal needs.

In addition, the Keeley Hydra’s ‘Alt Controls’ let you access in-depth parameters to shape the character of both engines. The pedal also offers an infinite reverb trail that’s perfect for creating dreamy soundscapes with, while the tremolo side’s footswitch doubles up as a tap-tempo function for syncing-up with a drummer or any musical accompaniment.

6 Sounds in Total!

Keeley’s Hydra pedal comes equipped with gorgeous Spring, Plate and Room reverb algorithms, plus tap-tempo enabled Harmonic, Vibrato and Sine wave tremolo sounds. All of these effects are accessible at the press of a button, and Hydra even allows you to save and store 3 of your favourite presets for instant recall.

Additional Features

With expression pedal control, remote bypass, analog-dry-through, kill-dry and a ridiculously low power-draw – the Keeley Hydra is sure to add immense flexibility and stunning sounds to any rig.

Key Features

  • Stereo, high-fidelity reverb and tremolo effects pedal
  • 3 memory presets, subdivisions, trails, infinite hold reverb trail
  • 3 reverb (Spring, Plate, 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 onboard 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
  • Made in Edmond, USA
  • Powered by a regular 9V DC PSU (centre -, 2,1 mm, low ~115 mA current draw)

Additional information

Weight 0.5 kg

About the manufacturer

Keeley

More info about this Product

Guitar Pedals

Guitar pedals are compact effects units that shape and enhance a guitar’s sound, sitting between the instrument and the amplifier. They include gain pedals like overdrive and distortion, modulation effects such as chorus and tremolo, time-based effects like delay and reverb, and essential utilities including tuners, compressors and loopers. Understanding basic things such as pedal type, signal order, power requirements and intended use helps players choose pedals that suit their style, setup and playing environment.

More Gear like this

Pedal

Pedals are the tools that let you shape, colour and transform your sound, from subtle tone enhancement to bold, creative effects. Whether you are adding grit, space, movement or control, a pedal becomes part of your playing rather than just an add-on. Exploring different pedals is about discovering what responds to your touch and helps your sound feel more like your own.

Reverb

Reverb (short for reverberation) is an audio effect that simulates the natural reflections of sound in a physical space. When you play in a room, hall, or cathedral, the sound waves bounce off the walls, ceiling, and floor, creating a sense of depth and ambience. Reverb pedals and processors recreate this effect electronically, allowing guitarists and producers to shape how “big” or “live” their sound feels. From short, springy echoes that mimic vintage amp tanks to lush, atmospheric washes used in ambient or shoegaze music, reverb adds dimension and realism — turning a dry, flat tone into something immersive and expressive.

Stereo

Stereo refers to an audio setup that uses two separate channels, left and right, to create a sense of width, space, and direction in sound. By sending slightly different signals to each channel, stereo allows effects and instruments to feel more immersive and three-dimensional compared to a single mono signal.

In guitar and audio equipment, stereo is commonly used with delays, reverbs, modulation effects, and multi-amp rigs to enhance depth and movement. Stereo setups can make a sound feel wider and more spacious, especially in recording or live environments where separation between speakers can be clearly heard.

Tremolo

Tremolo is an effect that creates a rhythmic pulsing by varying the volume of the guitar signal up and down. It can be subtle and smooth or choppy and pronounced, adding movement and texture to clean tones and is commonly associated with classic amps and vintage-style sounds.

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