Printer Friendly Forum Posts - complete audio overhaul

Hey guys I have a 2000 Celica GT-S that had the 8 speaker Premium sound. I started with buying a pioneer avh-4300. My left front speaker was blown so I bought Infinity Reference 6.5 Components in the front. I hooked them up without the crossover with the mids on the sub connectors and tweeter with the tweeters because the factory amp already had some filtering and I was told it would sound better this way. Everything sounded great and it got me thinking I could put another set of components in the back. So I ordered another set of Infinity components and also a KICKER ZX Series ZX350.4 - Amplifier - 4-channel, 4 gauge power and ground wire, monster 4 ch rca cables, 14 gauge speaker wire.

So after the headache of running new wires, running power and amp turn on, installing all 4 crossovers, running rca cables. etc. etc...
I power everything up and all seems fine at lower volume. I started to try and tune my amp for best possible gains. After playing with the settings on the amp and H/U, I have come to the conclusion I need help getting rid of this static fuzzy noise coming from the tweeters. I have absolutely no noise with the volumes low or off or anything like that. I only hear this fuzz (distortion) when volume is higher and I am playing music with a lot of symbols or treble. Music like Blink 182, R&B, Hip Hop. The fuzz sound can get very annoying at certain points in the song or stay fuzzy throughout the entire song. I am confused because I can play other music and it will sound crystal clear. I know the tweeters can sound way better because they were great up front when I had the factory amp pushing them.
Please help me.

Right now I have the amp high pass filters turned on, set at around 125 hz.
crossovers are set at 0 db, and H/U has high pass filter on and set at 80 hz. I have tried all types of different settings so i'm not sure what is the best option or if this is the real problem.