ok i have a hifonics bxi1610 4ohms-500, 2ohms-1100 and 1ohm-1600 its on a 2ohm dual voice coil 12'' L5 when i have it wired for 1 ohm, positive to positive, negative to negative you can barley feel it moving but when i have it hooked up 4ohm it hits hard but i know my sub can handle way more hifonics dont put out all there rating so i need to know why it aint working at 1ohm