Sparking speakers

[FL84K5]

I have Eclipse 6.5" speakers in my front doors. They are run off of a Concept 50x4 amp. The front channel of the amp is running the 6.5s while the rear channel is running the sub. When listening to my Bass Mekanik Cd for about 20 minutes at half volume on the reciever, the speakers will start to pop and you can see blue sparks at night. It just started doing this recently. I have 4volt preouts and my gains is less than halfway. I have no problems with the sub. While it provides a really cool visual effect at night, it sounds bad. It goies away when i turn the volume down. Also, it sounds like the speakers are panned all the way to the left or right. Both speakers are playing, but things like guitar solos that usually play through either the left or right speakers and not both are barely audible. Could this be in the head unit? The panning is centered. My headunit is a Sony CD5050X. All help is appreciated.

1984 K5 Blazer w/ 33" BFG All Terrains, 305, auto, no lift. 4" lift and 350 coming soon.

 

[DUKE]

That is weird. What speaker is sparking? all of them?

DUKE
Why go around when you can go over?
<a target="_blank" href=http://http://student.fortlewis.edu/~rdgebhardt/>http://http://student.fortlewis.edu/~rdgebhardt/</a>
85 K5 <font color=blue>Big Blue</font color=blue>

 

[FL84K5]

The right front speaker is doing it. The rear speakers are run of the head unit. I got a response from a car audio board where I also posted the question and they said it was the wires arcing at the connection and that wrapping each connection with electrical tape would fix it. As far as the panning problem, I had the RCA cable hooked up wrong. I'm using one cable from the headunit and use a splitter to go to both channels of the amp. I had two red going to one channel and two white going to the other channel instead of one white and red to each channel. Boy, I feel dumb.

1984 K5 Blazer w/ 33" BFG All Terrains, 305, auto, no lift. 4" lift and 350 coming soon.