Originally posted by steveng
sometimes the hiss sound is very noticable that i forgot i was listening a CD 
the crossover is supposed to be adjustable which is not clearly explained on the infinity manual. but for gain control, should i set it higher or lower?
if the crossover is adjustable there is either a switch. knob with 2-3 settings, or a jumper on the board with 2-3 positions. usually the positions are labled 0, -3, -6 i am assuming your using the 0 db setting. try going to the -3 or -6 personally i have found that if there is a - 6 setting the tweets are usually way too loud on the 0 setting.