Hi! I will try a Bogner Uberschall in a few days and I would know how's the best setting to get the most tight and powerful sound with this amp (sound like Rammstein's Reise Reise or Mercenary's The hour That Remains).
I havn't had a ton of experience, just got mine saturday, but the bogner site gives a great setting of everything at 1 o'clock. Then play with the presence knob and see how much it can change the sound.