Ive been exactly the same situation for about a year now… (DT 50 212, hd 500..4cm) LOUD as a you'd ever want it, but low volume setting sounds totally different, so its hard to fully set things where ya want them with limited face melting showtime levels.. with every possible scenario being suggested as "the way" to do it, its right back to the beginning with endless possibilities.. Far more than I was fully prepared for… So, I too could use any advise on a few things like, gain structure to get the fat full distorted sound.. unity gain? how can you know where the gain is registering without any lights or meter display… Im a Sound man by trade, so I feel like this should be a no brainer but doesn't seem to be because it requires so much time getting familiar and comfortable that its small bits at a time and a slow process.. so…. Im new at this form of interacting online, so my bad if my response is more like a ditto to the question already posted…