This pedal isn't well known on TB, but it really is fantastic. You essentially select a crossover frequency that splits your signal to two separate gain circuits. It can cop ANY (including B3K territory) OD or distortion tone that you can think of. Drop the crossover really low and even get some serious saturated fuzz. There are lots of moving parts to this guy, so fellow twiddlers like me will be in paradise. Its only downfall is the lack of presets. So many great options, I want to save them all. I ended up taking IPhone pictures of my favorite settings as I discover them. It is also a pretty big pedal and takes up a fair amount of space as well, but given the tones it is capable of, it covers the sonic territory of any number of dirt pedals. The only way you would lose low end with the XD-1 is if you deliberately filtered it out. It has 3 different control options to add in varieties of low end into your distorted signal. I love that I can apply the dirt to the higher frequencies and keep a beastly clean low end. I have held off on posting about this guy until the GAS honeymoon wore off. 6 weeks on the board, and its a keeper for me. I am attaching a couple of demo vids. Company demo by David Beers (Control walkthrough and demo): Check it out, it is well worth the time. I am happy to answer any questions that I can. I have no affiliation with Brimstone, just thought I would share a real gem.