Notadümble V2: JHS Pedals DIY kit fixes their mistake

Jul 17, 2026
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Notadümble V2: JHS Pedals DIY kit fixes their mistake

The JHS Pedals Notadümble V2 is the new DIY kit pedal, which rectifies a mistake of the original Notadümble release and adds even more great functionality!

Notadümble V2

Josh Scott has finally released his Notadümble V2 DIY pedal kit after a postponement last month due to a parts issue. Now, this new Dumble-style circuit is available to the masses, and it is priced at a very reasonable $119!

The initial run of 6,000 units is just the start, as this revamped circuit is going to be a permanent part of the JHS Pedals lineup going forward.

The Notadümble Story (condensed)

While the Notadümble V1 accidentally included the wrong boost circuit, the new V2 fixes that mistake and introduces several brand-new features based entirely on suggestions from JHS Pedals fans and users.

Some of these updates include adding a second footswitch, an effects loop, and an order toggle, while also moving the Presence trim pot right to the face of the pedal for easier access. We will take a closer look at these below.

It looks like Josh Scott has done a great job of answering everyone’s requests and making this DIY kit super flexible.

JHS Pedals
JHS Pedals’ latest DIY kit looks great! · Source: JHS Pedals

What is it? (the story of how it came to be)

In 2019, Josh reverse-engineered two rare Dumble units from John Mayer’s touring rig. The first was the “A Box Later” preamp boost, which we successfully cloned as the Box It Later. The second was the obscure BBC-1 preamp boost, which we later discovered Howard Dumble had actually copied from a 1970s Barcus Berry acoustic piezo preamp.

The NOTADÜMBLË V1 was supposed to feature the Box It Later circuit, but due to a clerical oversight following the passing of our head of R&D, Cliff Smith, they accidentally shipped the V1 with the BBC-1 circuit instead.

After discovering the mix-up, JHS Pedals owned up to the mistake, discontinued the V1, and launched the BBC-1 circuit as its own pedal called the Fumble.

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JHS Pedals The Fumble - Boost / Buffer
JHS Pedals The Fumble – Boost / Buffer
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JHS Pedals The Fumble
JHS Pedals: The Fumble · Source: JHS Pedals

DIY Kit

The kit comes with nearly everything you will need to build the pedal, minus a screwdriver. They even include the wrenches to tighten the pots (they push out the spare circuit board) and the tube of Goop for ‘gooping the circuit’, which is a tongue-in-cheek nod at the original epoxy-sealed circuits used by boutique pedal makers in the 90s, etc.

Notadümble V2
DIY kit · Source: JHS Pedals

V2 Updates in Detail

The V2 swaps out the BBC-1 for the correct Box It Later clean circuit. Instead of the V1’s channel slider, you now get two independent footswitches for a true two-in-one experience. JHS Pedals also added a TRS effects loop to the clean channel, allowing you to insert external pedals that engage with a single stomp (great idea), and this really makes this V2 pedal super versatile.

Notadümble V2
Notadümble V2 · Source: JHS Pedals

The overdrive Presence control was previously an internal trim pot and is now on the face of the pedal as a regular control. Making it perfect for setting the high-end content of your signal on-the-fly, without having to leave it set in one position, which was the only option with V1 unless you opened the unit up.

Finally, a new front order toggle lets you choose whether the drive runs into the clean channel or vice versa.

The Overdrive Channel

The left footswitch controls a boutique, high-sustaining overdrive that captures the iconic violin-like Dumble lead tones used by artists like Larry Carlton and Carlos Santana. Its controls include Volume, Drive, an EQ low-pass filter, and the newly externalised Presence knob.

The Clean Channel and Effects Loop

The right footswitch engages the clean boost and its integrated TRS effects loop. By using a TRS Y-cable, you can insert individual pedals or an entire secondary board into the loop.

This lets you activate complex effects chains with one click, or use the clean channel’s Output and Input controls to add a master volume and impedance shaper to older pedals. If no cable is plugged into the TRS jack, the loop is automatically bypassed.

Goop
Goop! · Source: JHS Pedals

Price, Availability, & Verdict

As I mentioned earlier, currently, in batch one, there are 6000 Notadümble V2 DIY pedal kits available priced at $119 each. JHS Pedals has stated they will be a standard part of their line going forward, so we will update you once they become available at Thomann.

I think the price point is excellent, and you get to enjoy building this kit. Then, as a reward for your effort, you get a really nice drive/boost pedal with some great new options added when compared to the V1. Well done to the whole JHS Pedals team for this release; it looks fantastic!

More Information

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