American bass protection mode

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I have 3 American bass amps each with their own power supply from a second battery. I had 3 Jl audio 15w3v2d4 but the foam is no good. I was in the process of switching out subs to kicker cvr subs. I hooked 2 subs up and decided to turn on the subs to see how they worked but the 2 amps that had the subs hooked up went into protection mode. No blown fuses. I have 0 gauge power and ground with extra battery. My 3rd American bass amp is not protect mode. Any help would be taken. Idk my model amps but they are all black with chrome in the middle. Only one light red or green. And my American bass stickers are coming off in the center of the amps
 
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