I don't know of any adjustments required .... that is a cheater amp.
expected power (I think I did the math right):
4X25 or 2X100 watts @ 4 ohms
4X50 or 2X200 watts @ 2 ohms
4X100 or 2X400watts @ 1 ohm
2X200 or 2X800watts @ .5 ohms
4X400 watts @ .25 ohms
Not really a good choice unless you are gonna multiple subs so you can load it down.