I just installed a new Kenwood ddx-418 headunit in my 07 altima, my stock speakers but I have a mtx amp and 2-12inch subs. Before installation my speakers worked fine, and the sub and amp worked fine with another deck in my honda accord- Now if I turn up the volume in my altima past 28(it goes to 35) I will hear a cracking, crackling sound coming from all the speakers. I'm not sure how to fix this... and I've searched many websites for solutions.. If I need a speaker amp does anyone know how to set that up? or have a website that explains how?

Any help would be appreciated.

Thanks


FYI: I turned the bass down on the stock speakers on my deck to the lowest and turned off loudness. Same thing!

 

So don't turn the deck past 28. Your tachometer likely goes to 8000rpm but your motor wouldn't care for that either...