Okay, i had an old NAD T750 driving my PSB 6T fronts and 2B rears for music and home theatre. recently, i upgraded to the Sunfire Ultimate Reciever. No problems initially, but i threw a small party (and music got quite loud), and next morning i noticed the following:

from both DVD and music sources:

- the top mid-range speakr on the left front sounds 'fuzzy' or distorted.
- the tweeters on both fronts do not seem to produce any sound, but 'hiss' slightly
- the tweeters on both rears do not produce any sound, but seem to 'hiss' slightly

I hooked up the old amplifier and all these same issues are present, so i'm pretty sure it's not the Sunfire. My questions are:

1. what does a 'blown' speaker sound like anyway, and does this seem like what happened to my left front?
2. why is there no sound coming from any of the tweeters, just a hiss (regardless of amp)?

3. the issue with the rear tweeters has me especially puzzled because i dont THINK the sunfire was playing on them at all. it's possible it was always there, and i never noticed?

4. what <2500 speakers can anyone recommend to avoid this problem in the future (if indeed the Sunfire was 'too much' for my crappy PSBs. I know a subwoofer is smart because it takes the load off the other speakers (i currently do not have one) but what else?

i should probably mention the CD player is a POS, and my cables are kinda cheap, but i dont THINK that's the issue.

Sorry to sound like such a newbie (i am) but i love my music/theater and i'm lost without it! Thanks in advance to everyone!

-jason