Hey guys, Killer Cougar didn't ask you to rip on him for his choice of equipment, he asked why it was that one of them was going into protect mode. While some of you gave him things to look at to solve the issue, a couple of you felt the need to rip on him because of what he purchsed. Maybe that is all he can afford. I would probably bet that most everyone here has purchased inexpensive equipment at one time or another, no big deal.
Killer, even though Nasty sounds like he is ripping on you, he brings up a good point about your alternator. Make sure that you are putting out enough juice for the amps to run. If they do not receive enough power they will go into protect. If you have the gain set all the way up for both of them, that requires more juice from the alternator/battery, if the amps are not getting it they shut down.
Try using each one on their own and see what happens. A good thing to do would be to look at the max amperage draw for your amplifiers, and all of the other electrical items in your vehicle. If you end up with more than what your alternator can put out, you will have problems. A new higher output alternator would solve that issue.
Good luck.