Out of the 231 overdrive layouts currently on this blog there is a pretty high proportion that are extremely close to the Tubescreamer (some are basically identical) and this is definitely one that is very close. But I also think there is enough differences to make this an interesting build, and there's no doubt this has quite a few fans so something must be working right here. 95% of it is a Tubescreamer, but the notable differences is there are no clipping diodes in the feedback loop of the first opamp stage, there is a single LED being used for aymmetrical clipping in the feedback loop of the second stage, and the Accent control is an added control for the second opamp stage which will alter the frequency response, and I think possibly the gain of the stage too. Those changes are enough to make this unlikely to sound just like a Tubescreamer even if the topology is extremely close in many other areas, and so this is one that I will definitely be building just to see how those sort of changes make this differ from what I would have expected from this circuit.
Still not worth anything like $600 though :o)
Expected cringeworthy marketing spiel:
One of the most iconic and sought after amps in history… in a pedal! All D*mble amps are different in tone but the main characteristics that set these amps apart are the open uncompressed cleans and the evenly compressed overdrive. These pedals are very limited. Shin’s music in Tokyo Japan is the builder and he knows tone. This does not sound like a pedal…it sounds and reacts like an amp. Many pedals claim this feat but few can back it up…The Dumbloid does!