Okay, let me tell you about some other tests I did last night. Since the center channel was the only speaker in my setup that did not make a noise with the abient clicks and the frequecy checks, I tried each speaker (FR, FL, RS, LS) plugged into where the center channel would be on the back of the reciever and ran all the tests again (frequency sweep and the clicks) and there was NO RATTLING from any of them. They all sounded fine when used as the center channel. Now for the kicker, when the actual center channel was plugged into either the FR or FL, there was a little rattling (just like the mains did) and when it was plugged into either one of the surrounds, there was lots of rattling (just like the surrounds did). This makes me believe that there is nothing wrong with my tweeters!! Whew!! But, leads me to ask two questions:
1) Are the frequency sweeps and ambient clicks on Avia suppose to sound the same through all the speakers?
2) If so, does it matter what surround mode I'm in (like Yamaha's DSP modes or 7-Channel stereo)? I was in the General DSP mode while running the test. I didn't try any other modes yet - wife was getting upset with all the noise.
3) If it doesn't matter could does this mean that either my DVD player is the problem or maybe my reciever?
BTW, Thanks for all the help!!