i put all new infinty speakers and a jl amp in my car and it used to scream pretty loud. But recently whenever i would turn it up it would just distort right away. Sometimes the normal quality would come back and i could turn it up real loud but then it would just go away and start distorting again. As of now it just destorts right away and i can barely even hear the radio on the highway. I checked the power to the amp and that was fine. Checked all the connections and grounds and there all fine. Any ideas about what could be wrong?