Speakers Crackling only when Amp set to highpass

[1point21gigawatts]

28 minutes ago, Dragonware said:

only just now seing this post I always say thank you in a comment when i get help. You are right I have been here long but I honestly never knew the importance of  the link  or thanks. I also never knew that you gain any sort of points from me doing it or I would have been doing that to all the ones who have helped me in the past. Apologies.  Didnt think this was like facebook or youtube where likes mattered that much.

I was being over dramatic. My bad dude. 

[Dragonware]

Final Update problem SOLVED

Ground Moved to dedicated  location, RCAs replaced problem still existed.

Played the music with my rear seat up so I could see the lights on the LC7i  turns out after vol 17 with the  LC7i gains at 80% the maximized light indicating distortion started to blink just when I would get the crackle.

 

So adjusted the LC7i gains down to aprox  45% and turned the amplifiers gains up to compensate.  system is fine now with the head unit all the way up to 24  which is where the dd-1 said it distorted at. 

 

The DD1 however never measured any distortion coming out of the lc7i or amplifiers so something there must have been done wrong.

Thanks again to all who gave sugestions.