so i got my first rig, Its a USA made Ampeg 410HE + Ampeg B2R (the head came with a Road Ready Case) , i got it for $500 on c's-list, sounds great! but i seem to notice that the higher the volume it has a little trouble with the low end?? and the head is only 200 watts, could it be that i need to match it up with the 1x15"? that would make the head 350 watts

and another question, well my brother helped me buy it, he said since he spotted me i have to let him use it to play music through a laptop or ipod for parties, should the laptop or ipod be plugged in as if it were passive or active?