I have gone through 3-12 kicker solobaric L5's,and now a 12in Kicker Solobaric L7. I have a 600watt Hifonics amp running the sub and now I just blew the L7, (well it's making a cracking noise when it hits) If anyone knows of any way to stop this please let me know

 
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Clipping is...set your gains properly and get a good HU with a clean signal output

 

I have a Kenwood 911KVT 6.5 in flip screen with DVD, I hope I would get good sound from the headunit. and what should I set the gains at

 
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Set the gains at the point where you don't cause clipping..

 
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yup mo is right set your gain correctly, your gain depends on your preamp volts from your HU, by default if you have a 2v set your gain to 1/3, 4.5v and up you can set your gain all the way

 
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Change your gains, check for leaks in your box, check all your connections.. and frayed speaker wire is one of the leading causes to speaker distortion....

 
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woah, this is an old post!!! [IMG]i/expressions/face-icon-small-tongue.gif[/IMG]

 
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n00b postwhores. hehe. jk. well maybe...

 
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What model hifonics amp is it? Their Zeus stuff is entry level and without being properly tuned can cause some pretty good damage.