Why The NOTADÜMBLË Isn’t What We Thought It Was

In 2019, I left a John Mayer rehearsal in Los Angeles with two extremely rare Dumble units in my backpack to reverse engineer. The first of these is the Dumble BBC1, which I turned into the basic boost that none of you have ever seen. And the second is the A box later that some of you have seen because John has shared, and I turned that into the box it later. This is what I claimed to have been the clean channel of the not a dumble.

But 2 weeks after the release, I realized I made a huge mistake. I accidentally used the more rare Dumble BBC 1 instead of the box it later. So without further ado, let me present to you the authorized history of the great Nada dumble debacle of 2025. the somewhat unbelievable story of how Josh Scott accidentally used the wrong clean circuit in the not a dumble and didn't realize it until two weeks after the release.

On Sunday, May the 11th, I knew I was going out of town for a family trip the next morning, and I wanted to prep for a short circuit where I was going to teach everyone how to modify the not a dumble with a few things that were being requested, like a second foot switch in place of the channel switcher. And I also wanted to put a TRS effects loop just like the a box later has so that if people wanted to experience the effects loop they could. I shoot an email to my head engineer Josh in and I simply say hey can you export these schematics and work up a quick little chart for me so I can do the short circuit when I get back. The next day he sent me a reply.

And upon reading the end of that reply I immediately froze knowing something was horribly wrong. Regarding the effects loop, there isn't any supporting circuit to do a proper return. I don't have any info on what was done on John Mayer's box it later, but I'm guessing Cliff, my former head of engineering, added a second post return circuit. The a box later has a very clear send return physically and when you're looking at the schematic.

So I realized in that exact moment he was looking at a very different circuit and I began ...