So, I recently acquired a Darkglass X ultra for my studio. I'm using my Tech 21 Dug Pedal in one of my bands.  I'm sure some people I'm sure will be interested in the comparison? I sat down the other day with my Rick 4003 and set to work. Firstly, both pedals are brilliant. There is no denying that. Now, let's get down to the meat. The Dug is obviously based on achieving his own tone. Now, not everyone wants that. I don't. However, despite it having a fixed crossover it's amazingly ver