*Even though this is an old thread, it contains all the relevant information for continuing this specific line of discussion. Starting a new thread about it would be a pointless exercise in repetition.*
Now that I've built both a ROG Umble and a clone of the original one-knob Dumbbell (as featured in the old youtube video I posted above) I can say definitively that they are nothing alike. The Gaspedals Dumbbell is much closer to the overdrive sound people want when they think of the "Dumble Sound". It also responds more like an amp when you play it. And since it's a simple circuit, it has a much lower noise floor than other complicated designs that use cascaded Fets or a myriad of potentiometers and switches. I found the Umble to be unusable because the idle noise sounded like Niagra Falls!
So yes, if you want an overdrive that gives you the "Dumble-like sound", or simply just want a great-sounding overdrive pedal, build this one:
https://www.madbeanpedals.com/forum/index.php?topic=35636.0
Now that I've built both a ROG Umble and a clone of the original one-knob Dumbbell (as featured in the old youtube video I posted above) I can say definitively that they are nothing alike. The Gaspedals Dumbbell is much closer to the overdrive sound people want when they think of the "Dumble Sound". It also responds more like an amp when you play it. And since it's a simple circuit, it has a much lower noise floor than other complicated designs that use cascaded Fets or a myriad of potentiometers and switches. I found the Umble to be unusable because the idle noise sounded like Niagra Falls!
So yes, if you want an overdrive that gives you the "Dumble-like sound", or simply just want a great-sounding overdrive pedal, build this one:
https://www.madbeanpedals.com/forum/index.php?topic=35636.0