parallel, most are 4 ohm while house stereo are 8 ohm *(i believe) your amp will be overloading .
I dont think its a wiring problem or you would more than likly get a interference with your sub amp just a spk prob, but check your conns anyway. RCA's wont shut an amp down they only transfer the audio signal,
2006 Mazda 3Behringer DCX-2496JL300/4 Focal 6W4311B Focal TN52JL500/1 JL10w6v2
i have just installed a new stereo in my 87 chevy wit 2 kicker tvt 12s with type s 6x9's and type r 61/2's i have 2 planet audio amps one 2 channel 500 watt for my subs and a 4 channel for my spakers i was playing music setting my amps then the next day when i came home i went in to listen to some music but when i turned up the volume eveyrything shutoff my headunit then came back on but my amps have not come back on since does any 1 know what could be wrong???