Keeley Hydra Stereo Reverb and Tremolo Effect Pedal

Keeley Keeley Hydra Stereo Reverb and Tremolo Effect Pedal

£249.00 (FREE UK Delivery)
Usually dispatched within 24 hours
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  • Spring, Plate, & Room reverb with Harmonic, Vibrato & Sine Wave tremolo
  • Three memory presets to quickly recall favourite settings
  • Go dreamy with the Infinite Reverb Trail
  • Switchable stereo true bypass/trails

Full Description:

The golden duo of effects

The Keeley Hydra Stereo Reverb & Tremolo achieves its immense versatility thanks to intelligent design. Firstly, your dry signal remains fully analogue throughout and its integrity is never compromised - this ensures tonal purity and keeps you sounding pristine. The three algorithm presets for each effect offer flexibility and a changeable order, so you're sure to spend hours fiddling and fine-tuning a wide range of celestial tones.



With full expression control over any parameter, and in any direction, this is perfect for live use, where dark stages mean you don't have the capacity to be button-twiddling on stage. The tap tempo can be operated both on-board or remotely with any style of pedal-switcher, so the Hydra can seamlessly integrate into existing, complex pedalboards. This easy integration is enhanced again by the Pro Rig designed, remote control thru 1/4″ jacks for live use with pedal switching systems.


Made in USA:

Designed and constructed in the USA, with all the quality you expect. You can feel, as soon as you get your hands on the pedal, that it's built to last. A robust chassis with sturdy controls, you instantly know this device can handle the rigours of live use and touring. The Hydra, therefore, combines ingenious circuitry with robust construction to deliver a top of the range pedal packed with functionality and lush soundscapes.



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

Made in Edmond, USA

Powered by a regular 9V DC PSU (centre -, 2,1 mm, low 115 mA current draw)


Power Supply: 9V Neg-Tip DC Supply

Current: 115mA

Input Impedance: 1M

Output Impedance: 10K

Stereo: True-Stereo Input and Output

Bypass: True-Bypass or Buffered Trails

Circuit: Analog Dry-Thru Blend

Dimensions (L x W x H): 120 x 68 x 58 mm

Weight: 350 g



We offer FREE DELIVERY on ALL orders within the UK (excludes Highlands & Islands for courier items).

We aim to dispatch all orders placed by 2pm and in stock on the same working day.  If something is out of stock with us then we will order it from our suppliers.  If an item is also out of stock at a supplier, we will contact you with an estimated delivery date.

Standard free delivery orders are usually sent by Royal Mail unless oversize in which case they are sent by courier, and usually arrive within 3 working days.  Express delivery orders are sent on a next working day service.  For clarity, this means an order placed on Friday will be delivered on Monday.  

Delivery to the Highlands & Islands or overseas will usually take longer. 


We want you to be completely satisfied with your purchase.  We recognise there will be occasions when you wish to return an item.  We offer a no-quibble 14-day returns period.  If you wish to return an item, please contact us via e-mail with your order number and your reason for return.  We will reply within 48 hours providing full return instructions. 

All items returned under our no-quibble returns policy must be in an as-new, resaleable condition including all accessories and retail packaging.  Items where the packaging will be damaged through opening it are not eligible for no-quibble returns.  Hygiene items such as Talk Boxes, Harmonicas, Wind Instruments etc are also ineligible for returns under this policy if there is evidence they have been opened and/or used. Please pack returned items appropriately to ensure no damage in transit.  We reserve the right to refuse refunds for items that are returned in a state which renders them unfit for resale as new. 

Items that are found to be faulty on arrival or within 14 days of receipt will be replaced.  After this period we will honour the manufacturer's warranty period for repairs and items will be repaired or replaced as deemed appropriate. 

Transit Damage & Mispicks

We make every effort to ensure your order arrives complete, correct and in the condition you would expect. In the event that the package shows signs of damage, please mark this when signing for it. In this instance or if your order is incorrect for any reason, please contact us within 24 hours of delivery so that we can rectify the situation. 


CITES regulations concerning the export of items containing certain woods affect any guitar sold ouside of the European Union and which contains any quantity of either Rosewood or Bubinga.  In these cases, an additional charge of £80.00 will be levied per species after the sale to pay for the required re-export certificate.  There will be a delay in dispatching any guitar containing either Bubinga or Rosewood of up to 4 weeks while we obtain the necessary certification for export. As the charge is per species, where a guitar contains both Bubinga AND Rosewood, the charge is doubled to £160.00.  We will contact you following your purchase of any guitar containing a controlled wood and advise of the charge once you have placed the order.  You can make payment for the charge by sending a Paypal payment to us at: sales@fxpedal.co.uk. 

Note that CITES only applies to guitars containing Rosewood or Bubinga that are being exported outside the European Union.  Guitars being delivered with the United Kingdom or in the European Union will be dispatched as normal. 

You can find out more information about CITES here: https://reverb.com/uk/news/new-cites-regulations-for-all-rosewood-species