New to me car with aftermarket system... Questions/Problem

[Extlmm]

Hey all thanks in advance for anyone that can give me any input and sorry if it gets a little long winded..

Took ownership of a heavily modified 2005 c6 corvette... 900Hp //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Which is all good and dandy but upon turning the audio up with any amount of bass there is some pretty heavy distortion/popping/clipping... im not quite sure what the proper term is. but it sounded pretty horrible. Highs are fine and with bass levels completely down little/no distortion.

I figured the previous owner cheaped out on the system install and just did a head unit and left garbage in it for speakers. Today i had the day off and tore into her. All has been upgraded at some point to my surprise... I found JL C2-690tx and C2-350X in each door, C2-525X on both sides in the rear, powered with a kenwood excelon XR900-5 amp, coupled to a Pioneer AVH-P8400BH HU...

So what do you guys think? Im no audio component expert. Are the speakers shot? not enough power, too much power? possible bad setup on amp?

Thanks again!

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[bigblank69 10+ year member]

Check the speakers and make sure they midbass hasn't been blown. Worse comes to worse replace the speakers, add a sub and send it.

 

[Extlmm]

How would i go about checking that? sorry pretty new... ha