amp cutting out strange

Also after cutting the truck off with the meter still attached the reading was 12.5V, so the battery is good (like Autozone said), and with the meter reading between 14V & 15V with the truck running I would assume the alternator is fine. 

When the guy at Autozone tested the alternator it had a peak output of 191 amps, it is only rated at 100 amps, is that a cause for concern?

I have read here that capacitors only put an extra draw on the cars electrical system, but if I am not overstraining the electrical system would a capacitor be a good idea as a regulator?

Thanks for any help you can give.

ckeeler, thank you for your response, I am not disregarding it, just hoping it is not the amp right now.

I set the Gain to audible distortion then backed off starting with the sub, at 3/4 max volume on the HU.  I am going to try and start over with the gains in a little while.

Yes it is a 5 channel amp, I am running the front components off channels 1 & 2, the rear door speakers off channels 3 & 4, and the sub off of the dedicated sub channel 5.

Thank you for the input hopefully I can get this fixed, I put alot of effort into a clean install and used the best components I could afford, now I would like to listen to it.  The thing is it is hit or miss, sometimes it cuts out sometimes it doesn't, more so in traffic or stop and go city driving.

I just went and reset the gains on the amp, I checked the voltage at the amp as i was doing this.  It seems that the voltage is dropping significantly (below 12V) with low bass notes and that is when the amp goes into protect.  I adjusted the gains lower than before, but the amp is going into protect even faster now.  I dont want it to be the amp, but I don't know of anything else it could be. 

The battery is fine, the lights dim very little when the system is working at night, but the system is only pushing 440 watts RMS, at 14V that is much less than 40 Amps, leaving 60 amps off the alternator for the rest of the vehicle.  Should I get a capacitor?  I dont want to spend any more money if it is just going to be the amp anyway. Any ideas?  I am ready to throw it all away and go back to stock.