interiors distorts ,amp goes protection

Hey guys, I pretty sure its a gains problem but im just geting a second opinon. Okay when i put my volume up to lets say about  70% my interiors speakers get distorted real bad and my sub amp goes into protection mode. From volume 65% and down its fine it sounds great but as soon as i jack it up past 65% this happens. I kno its not my alternator cau when i jack it up my alternator is still high.. It might could be the power but its not like down to 9 or 10.

any ideas? im running the type x @ 2ohm on a 750watt @ 2 0hm stable amp. Could it be something happens with the amp conflicting with each other? The sub amp gets the signal and from the sub amp it goes to my interiors thru the rca in/out jacks in the back of the amp. any ideas?

You have 2 amps? Both model numbers? How do you have it wired? Subs (model numbers) DVC<SVC, what ohm are the coils on speakers? interior componets? Have you done a search on how to set your gains properly, there is a lot of info on this site on how to do this.