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Hey everyone, just finished installing my JL Audio XR component set and im running them off a Hifonics ZX6000 amplifier. They sound great with my sub, but there is one noise that my tweeters make and I don't know if this is normal. This only occurs when my engine is running, and it is pretty much a squealing noise that both of my tweeters make. When I accelerate, the squeeling noise increases and when I decelerate, it decreses. When my car is in accessory, there is no squealing. It can be heard without any music playing, and when the sound is pretty low, the squeeling noise can be heard with the music. If you all could please help me fix this problem, I would really appreciate it. I am going to tweek my system tomorrow and if this isn't normal, I would like to fix it. Thanks!

 
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AH. Alternator whine. Most common problem ever.
Solutions:
1 - Check your ground wire for your amp. Make sure the area is sanded, the wire is secure, its the same size as your power wire.
2 - Check your rca's that theyre not crossing any power wires.
3 - Check your speaker wires, make sure theyre not crossing any power wires
4 - Give your HU a new ground on the chassis, not the stock ground

If all this doesn't work,

Congratulations, you've just purchased an audible tachometer!