the other day was ridin around and this noise that sounded like pop corn started commin from the amp. (i currently have 2 hifonics brutus 1605D amps, wired at 1 ohm to 2 RE Audio SX 12". i have it wired to 2 yellow top batteries.) but today, i was puttin in a line driver and took the ground wire out and the 2nd amp cuts on... why is that. the keys were out of the ignition and also, i have been having problems with that amp since it was installed... do u guys think that that could be it?