amp cutting out strange

I am impatient and could not wait until tomorrow so I went ahead and tested everything this evening as far as removing components to find the cause.  The components seem to be fine nothing caused the amp to go into protect mode.  But after putting everything back together and going to town the amp goes back into protect mode.  It is either the amp or the power draw from the amp.  I replaced the factory headlights yesterday and they are a larger wattage than stock so I am sure that is not helping.  The amp is going into protect mode even faster and at lower volumes than ever.

I am thinking of doing an alternator swap, the one that came on the Frontier is rated at 100A but the one for a Nissan Quest is 125A and a direct bolt up, would 25 more Amps make a difference, or am I throwing more money away?

I did upgrade the Big 3, is upgading the stock alternator of 100A to the one off of the Quest 125A enough or do I need to go larger than that? 

I am not competing, it is only a 540 watt amp, with a set of 6" components up front, 5.25" 2-ways in the rear and an 8" sub.  I was not really expecting that much of a power draw on the system. 

I have run 2 12" subs on 1000 watt amps with seperate amps for front and rear components in the past on smaller cars, and never upgraded anything, not the Big 3, alternator, or had to use any capacitors, what is the deal with this truck?

1.  Get the amp and your speakers/sub checked out.  Go to a reputable shop and have them check it.

The above assumes there is nothing wrong with your installation or setup, based on your replies in this thread.  That does not mean there is nothing wrong, however, so while you're doing #1 above, have them verify the install.  And don't waste your money on a cap, it's not likely to help.

Well I went today and had the system checked out.  All of my wiring is fine, and supposedly all of my components are fine.  I was worried about the amp, but it it is not the problem.  The professional I spoke with said that all of my components were good.  He spent alot of time testing everything, even pulling off the battery to test it.  He said I did not need a capacitor, the alternator may be putting out too much power.  The voltage at the amp was between 13-14.3 no matter what I was running on the truck, lights heater, blinker whatever.

The only explanation he had was that I may be getting too much power to my amp.  This does not make sense to me.  He never saw more than 14.2 volts at the amp or less than 13.8 V.  I am thinking he may not know what he is talking about.  The system is cutting out less than before, mainly at either acceleration, or braking, it does fine at normal driving. 

The installer I spoke with thinks that maybe I am getting voltage surges at accelaration or braking, but he does not have any proof of that with a Multi-meter, someone please help me out.  I know how electricity works, and I have done plenty of installs prior to this one.  How can he determine this without some proof, and what can I do to fix it?