Grampian Type 636 Reverberation Unit

This unit is now sold - we have a customer waiting for another - please get in touch...


This item has sold. Contact us for information about what we have incoming.


This unit is now sold – we have a customer waiting for another – please get in touch if you have one to sell.

Fully-restored Grampian Type 636 Spring Reverb for sale in excellent working order. Sounds huge – great for adding distortion and grit to any signal.

Demo of this unit below. 

These are increasingly hard to track down, and often have tricky issues to iron out – we’ve found few techs are able to make these sound as they should. This is a chance to obtain one of these remarkable units with our seal of approval.

Far from a one-trick pony, Grampians are things of wonder for anyone who loves rich harmonic distortion, and they have a myriad of uses in the studio – see our previous Grampian blog post for more on these machines. From Lee Scratch Perry to Pete Townshend of the Who, these unprepossessing grey boxes are responsible for a great deal of historic sonic mayhem.

This one is running on mains power at either 120/240v – it sports an Accutronics replacement tank and it sounds superb. The condition is exceptional. Photos to follow (the photo is of a previous unit we sold).

Jack sockets have been switched to conventional quarter inch (the originals are short “B” type sockets – very easy to damage by inserting a regular jack) and the all-important pilot light is functioning as it should. 

In excellent working order and covered by our usual guarantee.

Email any questions to

Commission sale on behalf of a client. If you have gear that you want us to look at selling on your behalf then please look at our Commission & Consignment page for more information and get in touch


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