My MTX JH600 works intermittently. I don't hear the fans coming on at all and the amp doesn't seem to get hot. Even at low power the amp will turn off all of a sudden and then boom back on after a minute or two. It comes back on and really booms the speakers hard right when it turns back on. Scares me every time! Any help is greatly appreciated. Thanks, Brian.

is amp getting power or not could be wires came loose inside speaker box

It seems you assume that it is not an overheating problem.
The problem is, the bulb gets really, really hot when using the projector. It doesn't matter whether it has been there without any usage. As you switch it on, it will start to get hot.
But the lamp or other parts of the projector should not get too hot. To control the temperature, air is moved through the projector with the help of fans. Air enters through air filters and move through the projector absorbing heat from hot parts. This prevents these parts from getting overheated.
But what if air doesn't flow freely? Then the parts CAN get overheated.
First, switch on the projector and check whether you can hear the fans working.
Next, switch off the projector and remove power cable.
After about 30 minutes, remove the cover and check whether the air filters are blocked. If they are, clean them with a small brush.
This would probably solve your problem.

check the fuse holder an the power holder on the inside of the amp an just to see check ur ground some time they lossen

What is the electrical system in the different car like?You may need to get a secondary battery for that amp.Also ceck your in line fuse,it may need to be larger.Sounds to me like you either do not have enough power,or a ground is not connected.

You more than likely have subwoofer(s) wired too low for the amp. It's only stable down to 2 Ohms. You should rewire the sub(s) so that the amp will "see" a 4 or 2 Ohm load.

It sounds like you have constant 12volts applied to your remote turn on lead. The amplifier will have 3 connections for power:

1. 12volt constant
2. chassis ground
3. 12volt switched power - this wire should come directly from your head unit. It only sends 12 volts when the radio is on allowing to amp to power up only when the radio is on.

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must be a bad amp..have you tried bridging them maybe youre channels are out it happens even if its brand new...factory deffects

check that the ground wire is bolted tightly to the chassis of the vehicle.

bad bulb or bad ground wire would be my guess