More Speaker questions, kinda not liking rockford fosgate at the moment. Options

[LimitedST]

so figured out what the problem was with the amp. the amp itself. its fried. so they need to repair it. and its under warentee, whatever thats fine.
but the 2 6x9's and the 2 4" speakers i got, sound like sh....
the 6x9's are 4-ways
and the 4" are 2-ways
im having the same problem with both, and its really frustrating.
I grabbed my old bazooka amp, wired it up, good to go. the subs worked perfect with it, although, not in a box so they sound ****ty, still, atleast they work.
turned car off, unconnected subs, connect the 6x9's to test em out. the speaker works, and that thing is loud for booms, but, the tweeters are just static. but static to a beat. sounds like its effed up. plugged the other one in. same thing.
same problem with the 4" also. speaker works, but tweeters are just static crackling to the beat of the song.
so my question is, did i just get fu**ed and got crap speakers? or is it cuz they are hooked up to the amp and not directly to the deck/ other speakers. should i try wiring them with the rear speakers or the front speakers and seeing if they do the same thing?

thanks in advance. limited.