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The Hifonics Brutus 2100 is stated to produce 2100 watts RMS @ 1ohm load. Most amplifier manufacturers overstate their claims. The 2100 watt output is most likely at 14.4 volts and not the 12.6 volts your car will actually be providing the amp.
But, even if the actual output was 2100 watts that would be 1050 watts to each 12w7. The 12w7's are rated at 1000watts RMS and 2000watts peak. As a MECP certified installer, any system I have done using 12w7's have had a MINIMUM of 1000 watts being provided to each speaker. My personal preference is to run 1500 watts each and keep the gains adjusted lower on the amp. Thus allowing the amp to run cooler and allow the additional headroom for those "show-off" moments!
there is a step up converter inside the amp that likes to come loose from the board. This may be your problem. Otherwise Check all the chips for burns or disconnect
ok theres a amp called slugger they came out about 7-10 years ago its small but very very powerfull i was picking up my 2 15 inch l7 kickers i drove from my house to vegas with no problem about 4 and a half hrs and didnt turn off ,on the other hand i had my fosgate wich i love t1000 wich turned off on me a couple times
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