Eighteen Watt

Eighteen Watt

RunOffGrooves entry into the Marshall in a Box circuit range. This one is lovely! Marshall released their amp in the 60's. 


The circuit consists of only one preamp stage, a volume and unique tone control setup, the phase splitter and a single power stage. There is no negative feedback, so distortion will be much easier to achieve. 

As you can see in the images, this PCB has been designed for to hang from the pots inside the enclosure. This provides ultimate security :) 

The kit is supplied with a JP1590B sized enclosure.


The circuit has been designed using Jfets, stocks of these are depleting globally, therefore the type listed in the parts list may be replaced with a readily available and appropriate substitute.

  • This kit compares to the 18 Watt by Runoffgroove. 


    There is no endorsement or approval from any manufacturer and this information is for comparison only.




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