Audio Systems: Car audio problems, monoblock amp, inch speakers

Question
Hello I had a custom install done not too long ago on my car with four twelve inch speakers, etc. Everything was wired right and it was a nice job (using 0 gauge throughout).  I am not a stranger to car audio as I know how to do installs check, and wire the correct impedance, etc. The shop left a spot open for another monoblock amp, and everything was pre wired. all I did was unscrew some panels hook up the ground, remote, power, and RCA's  and installed another MTX TE1501d today.  All went well for an hour straight of playing.  However I was crusing home on the e-way and not too far from home when the subs cut out, but the amps didn't go into thermal protection, they kept coming on and going out within a split second, and the mids and highs started to do the same thing within seconds of it first happening.  I figured maybe it was overheating at first so I kept it real low, and I mean real low and all was fine.  I then let it sit for a couple of hours, and went back out for a cruise and what do ya know same thing? I going to tear it apart tmw, but I was seeing if anyone had any suggestions.  Here are the symtoms..... Voltage is good , and everything plays well until I start turning it up.  As soon as it tries to hit one good bass note all sound cuts out.....my mids, highs, subs, everything, and then it comes back on within a second or two and another good bass note hits and same thing everything cuts out.  I checked to see if any of the amps were hot, and nope they were all cool.  So nothing is overheating, but I am a little stumped right now.  Any help would be greatly appreciated !!

If you are wondering all four subs are 2ohm DVC, and are wired in series/paralell to give a 2ohm load.  The amps are 1 ohm stable.  

Thank you, Jeremie  

Answer
Have you tried disconnecting the amp you added in?  When it disconnects does everything perform normal as it did before?

Now, try connecting the new amp back in, but disconnect one of the other amps to see what happens.

See where we are going with this?  There may be an overload on the car system and the voltage regulator or something like that may be cutting the system out.

Do you have power caps on any of the amps?  They might help.  They will smooth out the demand from the battery and car electrical system during heavy bass requirements.  These sub woofers really soak up the juice.

Also, if you have a VOM, put it on the 12v line feeding the amps and watch it; make sure you can see the voltage cut out when the amps drop out.   There may be a ground line that opens, a fuse that is acting up, or some silly thing like that.  So, you are going to have to hunt around and do some experimental testing until you can determine if it is an overload situation, a bad amp drawing too much current, a bad ground that can't handle the current, a shorted speaker line, etc.

I am very curious.  Can you let me know how it goes and what you find out?

Thanks,
Cleggsan

PS: A shorted voice coil in one of the speakers can cause hiccups like this, too.  So, try disconnecting speakers from each amp one at a time to see if that tells you anything.