my infinity tweeters are making this sssss noise when i play loud. does this mean they are cheap quality or there's something else that caused this? anyone?

 

it's pretty typical to get a little hiss from tweeters. try turning down the highest band of the eq or the treble a little and also check your gains on the amps.
also some tweeters like quarts are a little bright for tweeters. i don't know about yours, but you might consider attenuating the tweeters if there is an adjustment on the crossovers for it. try setting them down about -3 or -6 db if your crossovers have that adjustment.
my guess is they are probably a little bright anyway based on what you said.

 

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.

 

on inifinity manual, they called it contour control and mentioned something about moving jumper from left pin to right pin inside the xover box, but when i opened it up, everything was sealed. and there was no lable of db's. but anyway, what is jumper?

 

it looks like a row of small brass pins there is a black plastic "jumper" that connects 2 pins together. you can pull it off and reinstall it connecting 2 different pins. it is like a really rudimentry form of a switch.
the jumper can be as small as a pencil eraser or smaller. if there is one you will need tweezers or a small pliers to remove it.

 

maybe you can take a pic of it or give me a model number and ill look it up online

 

just turn down the treble a "notch" or 2... it'll clear right up and save the hassle of fukin with the crossovers...

 

where are the tweeters mounted? How are they wired? What are you using to power it?

 

it's not a matter with the treble control. in fact i've already turned it down to -5 and have still the same problem.